Actress/Singer Ashley Tisdale at Glamour and Sephora's party in New York. Photo: Jamie McCarthy. WireImage for Glamour Magazine

Got a guilty pleasure? Ashley Tisdale wants you to give it up. But it's all for a good cause.

Glamour magazine and Sephora celebrated the singer/actress's latest CD, "Guilty Pleasure" at a listening party/shopping extravaganza at the beauty retailer's Fifth Avenue store in New York City Tuesday night. The occasion was not just a chance for fans to meet Tisdale, but also to raise money for one of her favorite charities,

Here's how it works: Skip 1 asks people to skip one thing they purchase for one day (that cup of designer coffee; a Jade nail polish manicure; you get the idea... ) and donate the cost of the item instead. All public donations go to the acquisition and distribution of food and water projects worldwide, according to the group

Glamour donated $10 of every purchase (up to $2,500) to With all that goodwill in the air, there were smiles all around.

The event, which was for Sephora's Beauty Insiders, drew a mix of over 300 excited Ashley fans. An adorable little girl wearing Stella McCartney for Gap waited patiently with her mom alongside a gaggle of lip-glossed teens for the High School Musical star to sign a 'kiss card' (a card that had two imprints of Ashley's lips in different shades of pink lipstick).

For more charitable fashion, read about this designer's clever recycling plan to benefit the Princess Project.