Background: Slipknot is an American heavy metal band from Des Moines, Iowa. The band was formed in 1992 by percussionist Shawn Crahan, drummer Joey Jordison and bassist Paul Gray. After several lineup changes in its early years, the band settled on nine members for more than a decade: Corey Taylor, Mick Thomson, Jim Root, Paul Gray, Craig Jones, Sid Wilson, Shawn Crahan, Chris Fehn and Joey Jordison. Gray died on May 24, 2010, and was replaced during 2011-2014 by guitarist Donnie Steele.
Context: Preparation for Slipknot's fourth album began towards the end of 2007; work began at Sound Farm Studio in Jamaica, Iowa, with producer Dave Fortman in February 2008. The album was finished in June, and the band the All Hope Is Gone World Tour on July 9, 2008. Slipknot's fourth album, All Hope Is Gone, was released on August 20, 2008, debuting at number one on the Billboard albums chart. The album produced five singles; "All Hope Is Gone", "Psychosocial", "Dead Memories", "Sulfur" and "Snuff". 2009 marked the 10th anniversary of Slipknot's debut album; to commemorate the event, the band released a special edition version of Slipknot on September 9, 2009. The band toured in support of the album throughout 2008 and continued until October 31, 2009, resulting in Slipknot's third hiatus.  During the hiatus, several band members focused on respective side projects; Taylor founded Junk Beer Kidnap Band and returned to Stone Sour with guitarist Root; Crahan continued working with his band Dirty Little Rabbits; and drummer Jordison returned with his band Murderdolls and became the new permanent drummer of Rob Zombie. Percussionist Fehn is now a full-time bassist with metalcore band Will Haven and Sid Wilson founded the eponymous band Sid.  In 2010, Gray was planning to tour with the supergroup, Hail!, but on May 24, 2010, he was found dead in an Urbandale, Iowa hotel room. Circumstances surrounding his death at the time were not immediately known; an autopsy suspected his death was not intentional but did not reveal the cause. The day after his death, the remaining eight members of the band held a live, unmasked, press conference alongside Gray's widow and brother. On June 21, the cause of death was confirmed as an accidental overdose of morphine and synthetic morphine substitute fentanyl.  The band was hesitant to comment on the future of Slipknot. The members made conflicting statements in interviews; drummer Jordison told The Pulse of Radio "there is another Slipknot record already kinda in the making". Vocalist Taylor told FMQB Productions' he was "very conflicted about whether or not [he wants] to do anything with Slipknot". The band released their fourth video album (sic)nesses on September 28, 2010; it debuted at number one on the Billboard Top Music Video Charts. The DVD features Slipknot's entire live performance at the 2009 Download Festival and a 45-minute film documenting their tour in support of All Hope Is Gone, and served as a tribute to Paul Gray.
Question: Why did they take this hiatus?
Answer: several band members focused on respective side projects;

Background: Expose is an American Latin freestyle vocal group. Primarily consisting of lead vocalists Jeanette Jurado, Ann Curless, and Gioia Bruno, the group achieved much of their success between 1984 and 1993, becoming the first group to have four top ten hits on the Billboard Hot 100 chart from its debut album, including the 1988 #1 hit "Seasons Change". In March 2015, Billboard magazine named the group the eighth most-successful girl group of all-time. The group was popular in dance clubs, mainstream Top 40 and adult contemporary charts in the United States.
Context: After Kelly Moneymaker joined Expose, the group released its self-titled, third album Expose, which integrated more mature material in addition to their established freestyle, house, R&B, pop, and love-ballad repertoire. It was also the first album to use producers besides Martinee, with Clive Davis taking over as executive producer and Martinee only contributing production to four songs. The album was aimed to demonstrate musical growth for the group and to compete with the success of Wilson Phillips, which had great success in 1990 with its debut album.  The third album was not as commercially successful as their previous two, but it still achieved gold status, and several singles fared better on the adult-contemporary charts. The group, however, did manage to crack the U.S. Top 40 pop chart with "I Wish the Phone Would Ring" and "I'll Never Get Over You Getting Over Me", a top-ten pop single which also reached #1 on the adult contemporary chart. Subsequent releases "As Long as I Can Dream" and "In Walked Love" featured Curless in the lead-vocal spotlight. A final, club-marketed single in 1995 saw the release of the group's first remake. "I Specialize in Love" featured Curless and Jurado on lead with Moneymaker supporting lead vocals toward the song's conclusion. The original version was performed by Sharon Brown and was a top ten hit on the Billboard Hot Dance Club Play chart in 1982. Among the group's television appearances during this period include Live with Regis and Kathie Lee, The Tonight Show with Jay Leno, The Les Brown Show, and the Brazilian actress-singer children's show Xuxa.  In 1995, Expose recorded the Diane Warren-penned song "I'll Say Good-Bye for the Two of Us", which appeared on the soundtrack of the film Free Willy 2: The Adventure Home with Jurado performing lead vocals; that same year, the song was issued on its Greatest Hits. The song is distinctive for the group as Jurado performs solo without backing vocals.
Question: Who were the major vocalists in i'll say good-bye for the two of us
Answer:
Expose recorded the Diane Warren-penned song "I'll Say Good-Bye for the Two of Us