Mick Jagger, B.B. King to help White House celebrate the blues

(CBS/AP) Mick Jagger, B.B. King and other musical greats are teaming up at the White House to celebrate the blues.

Jagger tweeted that President Barack Obama popped in during a rehearsal for Tuesday's A-list concert and "seemed really relaxed and happy!"

Grammy-winner Keb Mo joked during a break in Tuesday morning's rehearsal that Obama himself would be performing three numbers, and there was a record in the works.

Mo joked that Obama's record would be called, "After the second term, now I can finally get my groove on.''

Troy "Trombone Shorty'' Andrews says he's ready to back up the president on trombone should Obama decide to grab a microphone and sing.

The blues concert will be part of the "In Performance at the White House'' series that airs on PBS.