John Mayer: Performing at Tony Bennett's Birthday Concert!

John Mayer leaves Katsuya after having dinner on Thursday (August 25) in Brentwood, Calif.

The 33-year-old singer will help celebrate Tony Bennett‘s birthday at a September 24 concert at L.A.’s Staples Center.

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John will perform a duet with Tony, who turned 85 earlier this month, along with other celebs including Carrie Underwood, Stevie Wonder, and Diana Krall, according to the L.A. Times.

John and Carrie each paired up with Tony on his Duets 2 album, out Sept. 20, while Diana and Stevie collaborated with him on 2006′s Duets.