Stevie Wonder lent his voice to a tribute concert for Tony Bennett that aired on NBC earlier this week.

The legendary piano player connected with Lady Gaga to offer up a funky rendition of "Happy Birthday" for the special tribute event.

The Gaga tribute was an obvious choice for the Bennett birthday special as the two previously struck gold together on their album of jazz standards.

Bennett even later revealed that they may have more plans in the works.

"She and I are talking about doing a second album," Bennett told Billboard in an interview posted on Wednesday.

"There'll be just wonderful songs that she and I both like."

He added, "She's busy right now, but at the beginning of next year we'll start doing an album.

The first one went way over a million, and it's still selling."