The Flaming Lips and Weezer joined one another onstage this past Thursday at New Jersey’s PNC Banks Art Center to play some tracks including “She Don’t Use Jelly,” “Undone- The Sweater Song” and and cover of Black Sabbath’s “Sweet Leaf.”

Beyond the cooperative tracks, frontmen Rivers Cuomo and Wayne Coyne also made their way out into the crowd via gigantic blow up hamster ball-type devices known as double bubbles, which you can see from Coyne’s Twitpics below:

The two groups traded off leading and cooperating between songs. Videos for the collaborative efforts for “She Don’t use Jelly” and “Undone- The Sweater Song” are below:

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