Background: Aly & AJ, known briefly as 78violet (pronounced: "seventy-eight violet"), are an American pop rock duo that consists of sisters Alyson Michalka and Amanda Joy Michalka. They signed a recording contract with Hollywood Records in 2004. Their debut album, Into the Rush, debuted at number 36 on the US Billboard 200, and was later certified gold by the Recording Industry Association of America (RIAA). It has sold 839,000 copies domestically and one million copies worldwide.
Context: Aly & AJ's debut studio album, Into the Rush, was released on August 16, 2005, and certified Gold by the RIAA in March 2006. One of the album's singles, "No One", was featured in the Walt Disney Pictures feature film Ice Princess and its soundtrack. The song "Do You Believe in Magic", written, composed and originally recorded by The Lovin' Spoonful under John Sebastian, added a rock edge to the album. This cover was used in the soundtrack of the made-for-TV Disney Channel original movie, Now You See It..., in which Aly had a starring role as Allyson Henlen. "Do You Believe in Magic" became their first single to enter the top 20 of the Canadian Hot 100 chart, peaking at No. 23 and at No. 2 on the U.S. Billboard Hot Singles Sales. Into the Rush has sold 839,000 copies in the United States and one million copies worldwide.  The album received positive reviews from critics. Fran Grauman from About.com gave the album a four star rating, praising Aly and AJ's "ton of talent" and "experience". Allmusic gave the album a mixed review, saying it "doesn't venture further than offering a few empowering ballads", to hand them 2.5 stars after. AMG does praise them for having a real singing ability, citing "Aly & AJ can actually sing - their vocals have more personality than prefab Disney hopefuls like Hayden Panettiere or Caleigh Peters - and the arrangements are slick without resorting to flashily empty pap." The review finishes by remarking, "Into the Rush is listenable, likeable and more about being memorable than being a Disney product." The album became the 112th best-selling album in the United States in 2006, earning it a place as No. 112 on the Billboard 200 end of the year chart of 2006.  The sisters have been involved in various Walt Disney Records projects. The "Aly & AJ Concert" took place on July 24, 2005 at the Henry Fonda theater in Hollywood, California. The aired concert was cut to five songs and interviews, and included songs from Into the Rush. The sisters opened for The Cheetah Girls in December 2005, on the Cheetah-licious Christmas Tour.  The album was re-released in August 2006 with three new songs, including the chart selection "Chemicals React" and two new versions of "Collapsed" and "Something More". It was also released in the United Kingdom. The sisters released their second studio album, the Christmas-themed Acoustic Hearts of Winter, on September 26, 2006. On the album, Aly & AJ recorded traditional Christmas songs. In late 2007, the sisters recorded three more original Christmas-themed selections. Acoustic Hearts of Winter debuted at No. 78 on the Billboard Hot 100, selling over 19,000 copies in its first week. The album also charted the U.S. Billboard Top Holiday Albums, debuting at No. 14. The holiday album later sold over 110,000 copies in the United States.
Question: Did they have a hit single?
Answer: "Do You Believe in Magic" became their first single to enter the top 20 of the Canadian Hot 100 chart,

Background: Iron Maiden are an English heavy metal band formed in Leyton, East London, in 1975 by bassist and primary songwriter Steve Harris. The band's discography has grown to thirty-eight albums, including sixteen studio albums, twelve live albums, four EPs, and seven compilations. Pioneers of the new wave of British heavy metal, Iron Maiden achieved initial success during the early 1980s. After several line-up changes, the band went on to release a series of UK and US platinum and gold albums, including 1982's The Number of the Beast, 1983's Piece of Mind, 1984's Powerslave, 1985's live release Live
Context: Iron Maiden were formed on Christmas Day in 1975 by bassist Steve Harris shortly after he left his previous group, Smiler. Harris attributes the band's name to a film adaptation of The Man in the Iron Mask from the novel by Alexandre Dumas, the title of which reminded him of the iron maiden torture device. After months of rehearsal, Iron Maiden made their debut at St. Nicks Hall in Poplar on 1 May 1976, before taking up a semi-residency at the Cart and Horses Pub in Maryland Point, Stratford.  The original line-up did not last very long, however, with vocalist Paul Day being the first casualty as, according to Harris, he lacked "energy or charisma on stage". He was replaced by Dennis Wilcock, a Kiss fan who used make-up and fake blood during live performances. Wilcock's friend Dave Murray was invited to join, to the dismay of the band's guitarists Dave Sullivan and Terry Rance. Their frustration led Harris to temporarily disband Iron Maiden in 1976, though the group reformed soon after with Murray as the sole guitarist. Steve Harris and Dave Murray remain the band's longest-standing members and have performed on all of their releases.  Iron Maiden recruited yet another guitarist in 1977, Bob Sawyer, who was sacked for embarrassing the band on stage by pretending to play guitar with his teeth. Tension ensued again, causing a rift between Murray and Wilcock, who convinced Harris to fire Murray, as well as original drummer Ron Matthews. A new line-up was put together, including future Cutting Crew member Tony Moore on keyboards, Terry Wapram on guitar, and drummer Barry Purkis (better known today as Thunderstick). A bad performance at the Bridgehouse, a pub located in Canning Town, in November 1977 was the line-up's first and only concert and led to Purkis being replaced by Doug Sampson. At the same time, Moore was asked to leave as Harris decided that keyboards did not suit the band's sound. A few months later, Dennis Wilcock decided that he had had enough with the group and left to form his own band, V1, and Dave Murray was immediately reinstated. As he preferred to be the band's sole guitarist, Wapram disapproved of Murray's return and was also dismissed.  Steve Harris, Dave Murray and Doug Sampson spent the summer and autumn of 1978 rehearsing while they searched for a singer to complete the band's new line-up. A chance meeting at the Red Lion pub in Leytonstone in November 1978 evolved into a successful audition for vocalist Paul Di'Anno. Steve Harris has stated, "There's sort of a quality in Paul's voice, a raspiness in his voice, or whatever you want to call it, that just gave it this great edge." At this time, Murray would typically act as their sole guitarist, with Harris commenting, "Davey was so good he could do a lot of it on his own. The plan was always to get a second guitarist in, but finding one that could match Davey was really difficult."
Question: Did they replace him?
Answer:
He was replaced by Dennis Wilcock, a Kiss fan who used make-up and fake blood during live performances.