At the prompting of musician Mick Jagger, President Barack Obama took center stage at a White House concert on Tuesday night, seizing the mic and crooning with the best of them to the tune "Sweet Home Chicago," putting on display a singing voice that's only been heard in public once before.

But it wasn't until the very end of Tuesday's Black History Month celebration and concert to honor 86-year-old blues artist B.B. King that the president graced the stage, seeming like he wasn't prepared for his second musical interlude this year.

But he just couldn't say no to Jagger and blues rocker Buddy Guy, who suggested that Obama's recent rendition of Al Green's "Let's Stay Together" was worthy and prodding him to "keep it up."

This video is from CBS This Morning, published Wednesday, Feb. 22, 2012.