This is Hilaria Thomas, Alec Baldwin's new wife. Her project to get famous worked! From the New York Post:
She claimed to know nothing about showbiz when she started dating Alec Baldwin, but now that they've made it up the aisle, Hilaria Thomas is going in front of the cameras, too. The yoga instructor landed a gig as a host on celebrity-news fix "Extra." Thomas will co-host a Hamptons special on the entertainment show -- fronted by all-muscle, teeth and dimples Mario Lopez and the ubiquitous bikini-wearing Maria Menounos -- next weekend. The special is expected to showcase hot spots such as SoulCycle, where Thomas has taught yoga on weekends since early July.
You've got to admit, yoga does do a number on one, and it's a great number as well.