January Jones Photobombs Barry Manilow and Carole Bayer Sager in Hollywood: Hilarious Picture!

January Jones photobombs Barry Manilow
January Jones photobombed Barry Manilow and Carole Bayer Sager at the 2nd Annual Rebels With A Cause Gala. Mark Davis/Getty Images

Mad for Manilow! January Jones photobombed singers Barry Manilow and Carole Bayer Sager at the 2nd Annual Rebels With A Cause Gala held on Thursday, March 20 in Hollywood.

PHOTOS: Celebrity photobombs

The Mad Men star, wearing a black and white striped dress, noticed photographer Mark Davis snapping Manilow and Sager — both of whom were entwined in deep conversation. So what did Jones do? The actress, 36, popped her wavy blonde tresses into the frame and flashed a mega-watt smile with her bright red lips.

It turns out that Jones was in a very good mood at the gala, an eyewitness tells Us Weekly. Pharrell Williams, one of the key performers at the event along with 70-year-old Manilow, performed his hit single, "Happy," and included the star into his repertoire. "He made a beeline to January and Chris [Pine]'s table while performing, and said 'Come on January!'" reports the insider.

"He grabbed her out of her seat and motioned for her to dance with him. She blushed and danced with him for a second, and then went back to her seat and took a phone pic of him while he was up close."

The moment may have been spurred by some liquid encouragement, too. "January kept tossing back the wine," the eyewitness tells Us.

Rebels With A Cause, now in its second year, benefits the USC Center for Applied Molecular Medicine. Along with Jones and Pine, the star-studded event was also attended by Anna Kendrick, Isla Fisher, Jimmy Kimmel, and Jonah Hill.

Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!

Want stories like these delivered straight to your phone? Download the Us Weekly iPhone app now!