Linkin Park frontman Chester Bennington made a surprise appearance over the weekend at a Stone Temple Pilots concert. Even more surprising, he had teamed up with the band on a new single.

FMQB reports that Bennington appeared on stage with Stone Temple Pilots on Saturday at the Weenie Roast concert. As part of the set, Bennington performed a number of the band’s classic hits, but they also debuted a new song called “Out of Time.”

Of course, Bennington won’t be a full time replacement for recently ousted Stone Temple Pilots frontman Scott Weiland. Instead, the band says they “thought it would be cool to try something together.” Fans of Bennington will be pleased to know that Linkin Park will remain his priority.

As for Bennington himself, he said that he was thrilled to work together with Stone Temple Pilots:

“I’ve loved STP since I was 13 years old and they’ve had a huge influence on me. When the opportunity came up to do something creative with them, I jumped at the chance. The guys in Linkin Park have been incredibly supportive of me undertaking this project while I’ve continued to work on new music with LP.”

CBS Radio has released the new Stone Temple Pilots single as a free download. You can grab it here.