Kristen Hall, who exited Sugarland in late 2005, is suing remaining members Kristian Bush and Jennifer Nettles for $1.5 million.

According to a lawsuit filed in U.S. District Court in Atlanta on July 29, Hall was to get a cut of the group's profits, even after she left in 2005 for a solo career. The lawsuit claims that Hall founded the band in 2002 and has an agreement with Bush and Nettles to equally share profits and losses.

Hall claims in the lawsuit that she has been excluded from the group's profits since she left. Based on the filing, it appears that Hall's agreement with the Bush and Nettles was an oral partnership agreement.

Sugarland's publicist at Mercury Records Nashville declined comment and referred calls to the band's attorney, Gary Gilbert, who was unavailable for comment at press time.

The band's third album, "Love on the Inside" (Mercury/UMGN) moved to No. 1 on this week's Billboard Top 200 after debuting at No. 2 last week. Sugarland's first two albums, "Twice The Speed Of Life" and "Enjoy The Ride," have sold 2.5 million and 2.3 million copies respectively, according to Nielsen SoundScan.