Secretary of labor Hilda Solis poses with the a cappella group On a Sensual Note in her office at the Department of Labor on Thursday. (U.S. Department of Labor)

It looked like the high point of Hilda Solis’s Thursday would be be a press conference — until an a cappella group of American University students surprised the Labor Secretary for her 54th birthday.

The group’s name? “On a Sensual Note.” Motto: “Guys in ties doin’ what feels right.”

A Solis staffer and alum of the ensemble arranged for the group to begin singing on the balcony outside of her downtown office, then step inside to serenade her with “Please Mr. Postman,” “Hero,” “In the Still of the Night,” “California Dreaming (a favorite — she’s from East L.A.), “Brown Eyed Girl,” “Run Around Sue,” and “Happy Birthday, Madam Secretary.” No “Heigh-ho, Heigh-ho?” Solis got all teary and told them, “I haven’t had this much fun in a long time!”

Surely you want to hear what a group called “On a Sensual Note” looks and sounds like? Video after the jump...

Video: On a Sensual Note sings “Brown Eyed Girl,” 2009