Katharine McPhee is a Birthday Babe

Katharine McPhee and her husband Nick Cokas are enjoying some Carney’s Express hot dogs in Studio City, Calif. on Tuesday.

The 24-year-old American Idol alum has just signed a two-year endorsement deal with Neutrogena, joining Hayden Panettiere, Vanessa Hudgens, Mischa Barton and Jennifer Love Hewitt in representing the skin care company.

McPhee and her 42-year-old husband first met on the set of a TV show which Cokas was producing in 2005.

Katharine turned 24 on Tuesday. Happy Birthday, Katharine!

Handbag by Gucci.