Fall Out Boy rockers Pete Wentz and Patrick Stump landed in hot water with the law, after they performed an impromptu gig in a New York park without a permit.
The stars hit the Big Apple's Washington Square Park and thrilled passers-by with an unplugged set of their band's hits.
But their busking didn't go down well with certain authorities - they were told to stop by police, who threatened to arrest the duo if they continued to play without obtaining a street performance permit.
According to New York gossip column PageSix, Wentz considered ignoring the threat - but was advised to back down by members of his entourage.
A source tells the publication, "They improvised and did one song with Patrick singing a cappella and Pete Wentz doing air guitar. The crowd was into it.
"After they sang the a cappella song, Pete went over to his guitar case like he was going to say 'Screw it' and just get out his guitar and start playing, but his manager, or his security, or some man on his team told him, 'No, Pete, don't do it - you can't'."