Camp Rock, their Disney Channel movie which featured several musical performances by the teen band, snagged 8.9 million viewers Friday night, making it the most-watched cable program this year.
The movie is a Cinderella-like tale where Kevin, 20, Joe, 18 and Nick, 15, star as teen pop stars sent to a prestigious rock camp. Actress/singer Demi Lovato, 15, co-stars as the poor-girl-with-a-booming-voice whom Joe flips over.
As big a smash as Camp Rock was, it didn't come close to last summer's juggernaut High School Musical 2, which debuted with 17.2 million viewers in August.
But the brothers don't have time to worry about that. They kick off their summer tour July 4 in Toronto and are developing a Disney TV series in which they'll play spies.