One year after her divorce from Tom Cruise, Katie Holmes isn't quite ready to rebound with another A-lister. As previously reported, the single actress, mom and designer, 34, was happy to boogie with Jamie Foxx onstage at last weekend's Apollo in the Hamptons benefit in East Hampton, New York -- where the trained dancer shook her moneymaker with Foxx, 45, to sexy tunes like "Blurred Lines" and "Get Lucky."
According to a witness at the Aug. 24 bash, however, Django Unchained star Foxx tried to get lucky himself after the dance fest. "They danced, and after a hug he grabbed her butt and tried to seal the deal," the observer tells Us Weekly.
Alas, Holmes -- mom to 7-year-old Suri -- rejected him. "She was flattered, but not interested."
A pal of the Mania Days actress maintains that the twosome "weren't flirting and have been friends a long time." (Foxx and Holmes' ex Cruise, 51, costarred in 2004's Collateral together.)
Other stars at the bash included Ellen DeGeneres, Pharrell Williams and Colin Powell -- all seen onstage during the dance-off.
Says another witness of Holmes: "She seemed unsure at first, and then she got up on the stage and just started letting loose with everyone else. She seemed really happy with the whole night and who was around her." Neither Holmes nor Cruise have stepped out with new romantic partners since their six-year marriage ended last August.