Bachar's departure preceded the release of their second studio album, "Doll Domination". Released in September 2008, the album attained their highest peak position on the US "Billboard" 200, but it is considered a commercial disappointment selling less than 400,000 copies in the US. "Doll Domination" included the singles "When I Grow Up" and "I Hate This Part", which reached the top twenty on the US "Billboard" Hot 100 chart. In January 2009, the group embarked on the Doll Domination Tour, their second headlining concert tour, which highlighted stops in Europe, Oceania and Asia, and grossed over $14 million. In the meantime, tensions erupted within the group as Sutta and other members where dissatisfied with the label's decision to credit Scherzinger as featured artist on "Jai Ho! (You Are My Destiny)". The singer later suffered a back injury during the first Sydney show, leaving the group performing as a foursome throughout the following dates. The injury and Scherzinger's over-emphasis as the lead singer where factors in Sutta's exit from the group. Sutta explained that living in "the shadow of [... wasn't a joyful experience" adding that her broken rib "sent over the edge" and influenced her decision to leave the group.