Britney Spears has seriously been hitting the gym, as evidenced by her hot bod in the new music video for “3″, her most recent single. Sporting teeny leotards and black and white lace, the princess of pop could be back at her prime. Check out the new video:

The song is catchy and the video does a good job of showing off Britney’s fitness, but the shadowy gyrating dancers get a bit repetitive…and it’s nowhere near as flashy or exciting as “Toxic”, “I’m a Slave 4 U” or even “Oops…I Did It Again”. What do you guys think? Is the Britney craze over, or is she going strong? The song did debut at #1 on the Billboard Hot 100, which seems to be proof that she’s still got it. According to Brit’s official website, “3″ is the first title to debut at No. 1 since Taylor Hicks’ American Idol victory song “Do I Make You Proud” did so in July 2006. She’s also the #2 most-followed person on Twitter — yowza!

“3″ comes from Britney’s new Singles Collection, which will be released on November 10. The disc features 17 remastered tracks, gathered from her numerous hits over the years, including “Baby One More Time”, “Stronger”, “Boys”, “Me Against the Music” and many more. I have to admit — Britney is ready for a greatest hits. I don’t think I’ll be adding it to my shopping list, but there are definitely a lot of fun songs on there.