Alba flaunts her post-baby body while vacationing in Mexico with hubby Cash Warren. Plus: J.Lo & Casper, Ben Affleck, Olivia & Jason and more

NEW YEAR, NEW COUPLE

Days after cheering on the University of Kansas Jayhawks together, actress Olivia Wilde and Saturday Night Live star Jason Sudeikis enjoy a romantic New Year's Day stroll Sunday in N.Y.C.