Question: Madness are an English ska band from Camden Town, north London, who formed in 1976. One of the most prominent bands of the late 1970s and early 1980s 2 Tone ska revival, they continue to perform with six of the seven members of their classic line-up. Madness achieved most of their success in the early to mid-1980s. Both Madness and UB40 spent 214 weeks on the UK singles charts over the course of the decade, holding the record for most weeks spent by a group in the 1980s UK singles charts.

The core of the band formed as The North London Invaders in 1976, and included Mike Barson (Monsieur Barso) on keyboards and vocals, Chris Foreman (Chrissy Boy) on guitar and Lee Thompson (Kix) on saxophone and vocals. They later recruited John Hasler on drums and Cathal Smyth (better known as Chas Smash) on bass guitar. Later in the year, they were joined by lead vocalist Dikron Tulane.  This six-piece line-up lasted until part way through 1977, when Graham McPherson (better known as Suggs) took over the lead vocals after seeing the band perform in a friend's garden. Dikron went on to be an actor under the name Dikran Tulaine. Smyth, who left after an argument with Barson, was replaced by Gavin Rodgers, Barson's girlfriend's brother. McPherson was kicked out of the band for too often choosing to watch Chelsea instead of rehearsing. Thompson left the band after Barson criticised his saxophone playing.  By 1978, the band had allowed McPherson to return, after filling in temporarily for Hasler (who had taken over vocals when McPherson was removed). Thompson returned after patching things up with Barson. Drummer Daniel Woodgate (Woody) and bass player Mark Bedford (Bedders) also joined the band, replacing Garry Dovey and Rodgers, respectively. After briefly changing their name to Morris and the Minors, the band renamed itself as Madness in 1979, paying homage to one of their favourite songs by ska/reggae artist Prince Buster. The band remained a sextet until late 1979, when Chas Smash rejoined and officially became the seventh member of Madness as a backing vocalist and dancer.

Using a quote from the above article, answer the following question: Why did they switch back?
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Question: Patti Ann LuPone (born April 21, 1949) is an American actress and singer, best known for her work in stage musicals. She is a two-time Grammy Award winner and a two-time Tony Award winner. She is also a 2006 American Theater Hall of Fame inductee. LuPone began her professional career with The Acting Company in 1972 and made her Broadway debut in Three Sisters in 1973.

Among LuPone's film credits are Fighting Back, Witness, Just Looking, The Victim, Summer of Sam, Driving Miss Daisy, King of the Gypsies, 1941, Wise Guys, Nancy Savoca's The 24 Hour Woman and Savoca's Union Square (in post-production, late 2010), Family Prayers, and City by the Sea. She has also worked with playwright David Mamet on The Water Engine, the critically acclaimed State and Main, and Heist. In 2011, the feature film Union Square, co-written and directed by the Sundance Film Festival's Grand Jury Award Winner, Nancy Savoca, was premiered at the Toronto International Film Festival. In it, LuPone co-starred with Mira Sorvino, Tammy Blanchard, Mike Doyle, Michael Rispoli and Daphne Rubin-Vega.  She played Lady Bird Johnson in the TV movie, LBJ: The Early Years (1987). LuPone played Libby Thatcher on the television drama Life Goes On, which ran on ABC from 1989 to 1993. In the 1990s she had a recurring role as defense attorney Ruth Miller on Law & Order. She has twice been nominated for an Emmy Award: for the TV movie The Song Spinner (1995, Daytime Emmy Award nominee), and for Outstanding Guest Actress in a Comedy Series on Frasier in 1998. She had a cameo as herself that year on an episode of Saturday Night Live hosted by Kelsey Grammer.  LuPone's TV work also included a recurring role on her cousin Tom Fontana's HBO series in its final season, Oz (2003). She appeared as herself on a February 2005 episode of Will & Grace. She also appeared on the series Ugly Betty in March 2007 as the mother of Marc St. James (played by Michael Urie). LuPone had a recurring guest role as Frank Rossitano's mother on 30 Rock. LuPone appeared as herself in the season two finale of the television series Glee.  LuPone guest starred on Army Wives on July 8, 2012. She reunited with fellow guest star Kellie Martin as her mother once again. LuPone appeared in the 2013 film Parker, an action-thriller.  In 2013, LuPone was cast in the third season of the FX series American Horror Story as Joan Ramsey, a religious mother with a hidden past, and played herself in the third season of HBO's Girls. In 2015, she appeared in several episodes of the Showtime horror series Penny Dreadful as a cantankerous yet powerful white witch. She returned to the show in 2016 in the role of Dr. Seward, an alienist aiding Eva Green's character. Seward is an adaptation of John Seward from Bram Stoker's Dracula, and claims to be a descendant of Joan Clayton, the character LuPone portrayed in the second season. Also in 2016, she began appearing in Steven Universe as the voice of Yellow Diamond.

Using a quote from the above article, answer the following question: Who is a costar she had?
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Answer:
She reunited with fellow guest star Kellie Martin as her mother