Hilary Duff Hosts T.J. Martell's Family Day on Her 27th Birthday!

Hilary Duff is all smiles while hosting T.J. Martell Foundation’s 2014 Family Day at the Hammerstein Ballroom on Sunday (September 28) in New York City.

The “All About You” singer celebrated turning 27 that day. Happy birthday, Hilary!

“Excited to be hosting @TJMartell #FamilyDayNY tomorrow!! Who’s coming?!” she tweeted.

Performances included Jack Antonoff and his band Bleachers, Bea Miller, Pitbull, and TimeFlies.

The T.J. Martell Foundation is the music industry’s largest foundation that funds innovative medical research focused on finding cures for leukemia, cancer and AIDS.

FYI: Hilary is wearing a Raquel Allegra top, J Brand jeans, and Iro booties.

35+ pictures inside of Hilary Duff and more at the event…