Apr 11, 2014 at 4:45 pm

Alessandra Ambrosio Rocks Sexy Cut-Out Dress for Early 33rd Birthday Celebration!

Alessandra Ambrosio shows off a ton of back while stepping out for an early birthday celebration on Wednesday evening (April 9) in West Hollywood, Calif.

The supermodel, who turns 33-years-old TODAY (April 11), started her evening with a sushi dinner at Koi followed by a visit to 1 OAK nightclub with her gal pals and longtime love Jamie Mazur.

PHOTOS: Check out the latest pics of Alessandra Ambrosio

Alessandra will be attending the Coachella Music Festival this weekend and her team wrote a blog entry about how she is preparing.

“Coachella is just days away! We can hardly wait. Our outfits have been carefully chosen. Our flower crowns are packed. Our nails are done. What’s left to do but pick the perfect Coachella lineup? For this we are turning to the one and only Alessandra Ambrosio,” her staff wrote on her blog. “When it comes to music and fashion, her taste is unparalleled…trust us, she always has the best playlist rockin’ on any shoot. This year, between Lacoste parties and the Neon Carnival, she will definitely be checking out Beck, Arcade Fire, The Knife, Broken Bells, Lorde, Foster the People, Pet Shop Boys, Empire of the Sun, Cage the Elephant and Lana Del Rey. We suggest you follow her lead�”Coachella will not disappoint.”