.... Comparing the market research (sugababes) ....

Sugababes are an English pop girl group based in London, consisting of members Heidi Range, Amelle Berrabah and Jade Ewen. The Guinness Book of World Records have named the Sugababes as the most successful female act of the 21st century^[1] with six UK number one singles and eighteen UK top-ten hits.^[2]
Sugababes were formed in 1998 by founding members Siobhán Donaghy, Mutya Buena and Keisha Buchanan. In 2001, after just one album and some initial success, Donaghy departed and the introduction of Range in the same year was met with the commercial success. The group survived a second line-up change in December 2005, when Buena left the band and was subsequently replaced by Berrabah. In September 2009, it was confirmed that after eleven years in the band, Buchanan was no longer part of the group and had been replaced by Ewen.