Britney Swims with the Dolphins

What a difference a few months makes. In February, Britney Spears wouldn't even talk to her father, Jamie Spears, as he attempted to wrest control of her downward-spiraling life. And now, after inching ever-closer back to a normal life, the pop star and her pop spent the weekend together in Las Vegas for Father's Day, where Brit-Brit took in some exotic wildlife.

According to a source inside Vegas' Mirage Hotel & Casino, where Brit and dad were holed up for the holiday, the singer spent her afternoon in Siegfried & Roy's Secret Garden and Dolphin Habitat at The Mirage. "She swam side by side with the dolphins at the resort in a private pool," says the insider. "Later she gushed over Siegfried & Roy's six-week old tiger cubs in their special nursery at the Secret Garden taking pictures of the cubs with a female friend."

The singer was so enamored, she even stopped by the habitat's gift shop to pick up a plush tiger and plush lion, perhaps for her boys back in L.A.

After her swim with the dolphins, Brit had her stylist Kim Vo and his team of assistants re-do her extensions. Then, insiders say she checked out the tops-optional Bare pool lounge — though no one's saying if Brit, who was wearing a super-short blue sundress, did any showing off of her ample bosom. "She was all smiles," one witness tells OK!. "Glowing and looking totally fresh and healthy."