Federline, 29, headed to his favorite stomping ground – Las Vegas. But unlike his last visit to Sin City, this time he didn't bring the kids, just his close buddies.
"It's a guys' weekend," a source told PEOPLE.
After touching down Friday afternoon, Federline and crew caught a few rays at the Mirage's private adult pool, Bare, before heading out to dinner at Nobu. Next stop: Jet nightclub, where go-go dancers showered him with fake money to the tune of Fat Joe's "Make it Rain."
Just after 3 a.m., Federline and his entourage made their way to Caesars Palace's Pure Nightclub, where the aspiring rapper spent time in the DJ booth, and then on to the strip club Scores until the early morning.
The next night it was dinner and gambling until 2 a.m. before Federline left town about an hour later to drive back to Los Angeles. "He wanted to be with his kids on Easter," a source tells PEOPLE.
For her part, Spears, 25, spent Sunday afternoon at a Lakers game, arriving at half-time to cheer on the home team in an auburn wig and a straw cowboy hat before heading to the Lisa Kline boutique for some retail therapy.
After staffers asked customers to leave so she could shop in privacy, she spent $2,000 (plus another $2,000 at Lisa Kline Kids) on items including a camouflage pants-and-top set and Charlie Rocket swim trunks for son Jayden James, 7 months, and Wes and Willy shorts and Converse sneakers for Sean Preston, 1 – as well as dresses and hair clips for herself and a green Moses Basket for Chihuahua Bit Bit.
"She was in a great mood, ecstatic really," employee Kate Levington tells PEOPLE. "She was lots of fun to shop with. We had music on in the stores and she danced to the music and she ran around and picked out stuff for herself and her boys. You could tell she enjoyed herself."
Reporting by MARK GRAY, TIFFANY MCGEE and LYCIA NAFF
Preston Warner / Pacific coast news