My Chemical Romance made a surprise appearance alongside Weezer at a gig in Los Angeles on Tuesday (September 21).
The band's Gerard Way, Mikey Way and Ray Torro performed 'My Name Is Jonas' with the group. The song saw singer Way jump into the crowd.
Weezer were also accompanied during the show by Lost actor Jorge Garcia, who appears on the cover for their new album 'Hurley'.
Garcia performed 'Perfect Situation', accompanying Weezer singer Rivers Cuomo on vocals, reports Spin.
My Chemical Romance's appearance comes as they prepare to release their new album 'Danger Days: The True Lives Of The Fabulous Killjoys'.
The group are also set to embark on a UK tour next month.
My Chemical Romance join Weezer in Los Angeles:
YouTube video by a3s1g1.
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