Revamped band get new tour rolling in L.A.
Paramore, Macklemore, the Gaslight Anthem will also perform
Macklemore, JWoww, Selena Gomez and more
Rockers fill mansion with bikes, ballerinas and balloons
Rockers debut new track at SXSW
Rockers set for first North American tour since 2010
Song is first single from alt-rockers' upcoming self-titled album
'Of course it sucked when everything was falling to pieces,' says the singer
'Now' will be the first single from band's self-titled fourth LP
'I'm 23, but it feels like I'm 63!' she jokes
Listen to the band's song from 'Transformers: Dark of the Moon'