Britney Spears Nail Salon Calabasas blonde Friday Pop-star skirt

Britney showed off her new hair extensions while she was out continuing her primping/pampering tour getting a mani/pedi!

Brit added length to her locks the other day at the Montage hotel in Beverly Hills and then partied the night away Thursday night, with the likes of Paris Hilton and Ryan Phillippe at Palihouse, accompanied by boyfriend Jason Trawick.

So Britney's back on the scene and ready to celebrate her new single Hold It Against Me which drops on Tuesday.

Go get 'em, Brit! We can't wait to see your single skyrocket to the top of the charts!