Happy 28th Birthday, Britney Spears!

Britney Spears starts her 28th birthday celebration with a shopping spree at the Fred Segal store in West Hollywood on Wednesday (December 2).

The pop princess was accompanied by her agent (and rumored boyfriend) Jason Trawick.

Britney and her two sons — Sean Preston, 4, Jayden James, 3 — are featured in a new photo shoot for the January 2010 issue of Elle magazine (with Lady Gaga on the cover).

Below is a video of Britney and Jason holding hands. Is this confirmation of their relationship??