Britney Spears's Birthday Shopping for Jamie Lynn

Originally posted Thursday April 03, 2008 08:00 PM EDT

With her mother in tow, Britney Spears stopped by the corporate offices of Hollywood clothing store Ed Hardy on Thursday to buy birthday presents for sister Jamie Lynn, who turns 17 on Friday.

The singer was "in good spirits" according to Nicole Irving, a representative for the store. Spears stopped in the afternoon to visit designer Christian Audigier and browse the new spring collection.

"Christian and she were laughing as she tried on Ed Hardy sunglasses and checked out the bathing suits," says the rep.

For her sister (and mom-to-be), Britney, donning a pink Ed Hardy shirt, picked out a large selection of Christian Audigier handbags, scarves, and Crystal Rock T-shirts. She also snagged items for her father and brother.

Earlier Thursday, Spears, 26, spent the morning visiting sons Preston and Jayden at her Studio City house.