U.K. pop act the Sugababes will release their new album "Sweet 7" (Island/Universal) as planned on Nov. 23 in the U.K. and Europe, following the departure of the group's only remaining original member Keisha Buchanan.

The founding member of the group has left after 11 years, although she wrote on Twitter that it was "not my choice to leave" and spoke of a "lack of trust" amid a communication breakdown. She will continue as a solo artist.

Amelle Berrabah, the most recent addition to the line-up, missed a performance this month and there were media reports of a rift with Buchanan. Berrabah will remain alongside Heidi Range and the group has recruited 2009 U.K. Eurovision Song Contest entrant Jade Ewen. It is the fourth incarnation of the group.

Sugababes released its comeback single "Sexy Now" - featuring Buchanan - on Aug. 31. The track is currently at No. 10 in the Official Charts Co's U.K. singles chart and it peaked at No. 2.

A statement on the group's Web site said: "The current line-up of the Sugababes has disbanded. Heidi Range and Amelle Berrabah will continue as the Sugababes and will be joined by new member Jade Ewen. They release their album 'Sweet 7' on Nov. 23 through Island Records. Keisha Buchanan will continue to record for Island Records as a solo artist."

The group has signed with Roc Nation, Jay-Z's entertainment venture with Live Nation, for their first album release in the U.S. although there is no confirmed release date.