Question: With which band was Guðmundur Gunnarsson's daughter initially the lead singer ?

Context paragraphs:
Rock Star (TV series): Rock Star is a television series produced by Mark Burnett, David Goffin, and Lisa Hennessy in which aspiring singers from all around the world competed to become the lead singer of a featured group.  It debuted on CBS on July 11, 2005, to mediocre ratings.  The show was hosted by television personality and commercial spokeswoman Brooke Burke and Jane's Addiction & Red Hot Chili Peppers lead guitarist Dave Navarro.  In Australian band INXS chose J.D. Fortune as their new lead singer.  For , the band Rock Star Supernova chose Lukas Rossi as the lead singer of their new supergroup.

Rockaholic: Rockaholic is the eighth studio album by American rock band Warrant, released on May 17, 2011.  The album features the band's third lead singer, Robert Mason, who replaced original lead singer Jani Lane in 2008.  Lane returned to the band for a 2008 reunion tour but by the end of the year, he and the band parted ways for the second time.  Lane had previously replaced former lead singer Jaime St. James, who performed lead vocals on the band's last album, "Born Again", and who initially replaced Lane in 2004.

Barbados (band): Barbados is a Swedish dansband, formed in 1992, who have had several Swedish chart successes.  The band, with lead singer Magnus Carlsson, became widely known after their second place in Melodifestivalen 2000.  The band has replaced lead singer three times.  First Magnus Carlsson left the group in 2002 and later became a member of the group Alcazar.  Mathias Holmgren, a former Fame Factory student was the new lead singer, but was forced to leave the band in 2004.  Chris Lindh replaced him, before leaving the band in 2007.  The current lead singer is Björn Lagerström.

Lead vocalist: The lead vocalist, main vocalist, lead vocals or lead singer in popular music is typically the member of a group or band whose voice is the most prominent in a performance where multiple voices may be heard.  The lead singer either leads the vocal ensemble, or sets against the ensemble as the dominant sound.  In vocal group performances, notably in soul and gospel music, and early rock and roll, the lead singer takes the main vocal part, with a chorus provided by other band members as backing vocalists.

Kontrol: Kontrol are a Bulgarian punk band.  Initially active between 1988 and 2000, they achieved stardom in the early 1990s with their first two albums, "Bumm" (1991) and "Lele kako" (1993).  In 1997, their lead singer Nikolai Yordanov left and the band's popularity declined, which led to their dissolution in 2000.  They reformed in their original lineup in 2009 for a short Bulgarian tour, then reformed in 2014 with a new lead singer, Ivan Gatev.

Al Barr: Alexander Martin Barr (born January 21, 1968) has been the lead singer of the Dropkick Murphys since 1998.  He was also a founder and lead singer for The Bruisers, which he helped form in 1988 in Portsmouth, New Hampshire.  His first band circa 1984, was called D.V.A. (Direct Vole Assault).  He also went on to front 5 Balls of Power, with future members of Scissorfight, The Radicts, L.E.S. Stitches, and US Bombs, before he formed The Bruisers.  His band the Bruisers had played many shows with Boston's Dropkick Murphys, and when Dropkick lead singer Mike McColgan quit the band in 1998 the Murphys asked Barr to be the new lead singer.  The first album the Dropkick Murphys released with Barr as singer was 1999's "The Gang's All Here".

Guðmundur Gunnarsson: Guðmundur Gunnarsson (born 29 October 1945) is an Icelandic electrician and union leader.  The father of the singer Björk (Björk Guðmundsdóttir), he is a nationally known figure in his own right as the leader of the Icelandic Electricians' Union, Rafiðnaðarsamband Íslands (RSÍ).

Dado Topić: Adolf "Dado" Topić (born 4 September 1949, Siverić) is a rock musician from Croatia and the former Yugoslavia.  He was the lead singer and founder of Time, a 1970s progressive rock band.  From 1970 to late 1971, he was also the lead singer of the popular prog-rock band Korni Grupa (also known as The Kornelyans).  He is a rock musician from Croatia and the former Yugoslavia.  He was the lead singer and founder of Time, a 1970s progressive rock band.  From 1970 to late 1971, he was also the lead singer of the popular prog-rock band Korni Grupa (also known as The Kornelyans).  He is a male vocalist who sang the entry from Croatia in the Eurovision Song Contest 2007, together with the band Dragonfly.

Björk: Björk Guðmundsdóttir (] , born 21 November 1965), known as Björk ( ), is an Icelandic singer, songwriter, actress, record producer, and DJ.  Over her four-decade career, she has developed an eclectic musical style that draws on a wide range of influences and genres spanning electronic, pop, experimental, classical, trip hop, IDM, and avant-garde styles.  She initially became known as the lead singer of the alternative rock band The Sugarcubes, whose 1987 single "Birthday" was a hit on US and UK indie stations and a favorite among music critics.  Björk embarked on a solo career in 1993, coming to prominence as a solo artist with albums such as "Debut" (1993), "Post" (1995), and "Homogenic" (1997), while collaborating with a range of artists and exploring a variety of multimedia projects.

Tim Maurer: Timothy Robert "Tim" Maurer (born October 10, 1980) is an American singer, best known as the former lead singer of third-wave ska band Suburban Legends.  He has left the band on two separate occasions.  The first was in 2000 after the recording of Origin Edition.  He rejoined the band in early 2002 after his replacement singer Chris Batstone left the band.  He officially left the band again in September 2005 after the band's third consecutive appearance on the Jerry Lewis MDA Telethon, performing a new song entitled "Moving Closer."  The band's former trumpet player, Vincent Walker, rejoined the band for the performance, then took over as lead singer afterward.  Maurer returned for a final performance with the band on November 29, 2005 at Huntington Beach High School for a benefit show for the Ryan Dallas Cook Memorial Fund, which was set up following the death of Suburban Legends' trombonist Dallas Cook.

Supporting paragraphs: Guðmundur Gunnarsson Björk
Answer: The Sugarcubes,