Happy 21st Birthday, Hilary Duff!

Hilary Duff smiles from ear to ear as she spends her 21st birthday with hockey player boyfriend Mike Comrie at a children’s bookstore in New York City on Sunday.

Last month, Hil‘s mother, Susan Duff, wanted her ex, Bob, to contribute $25,000 to a birthday party and gift for the Duffster. A judge ruled that Bob had to pony up $12,500 for the bash. Hopefully we’ll get to see pictures from the birthday celebration!

HAPPY BIRTHDAY, HILARY!!!