Britney Spears Continues Rivalry With Christina Aguilera, This Time To Lose Weight

Britney Spears and Christina Aguilera were once pop divas competing for supremacy of the airways in the late 1990s and early 2000s, but now it seems the two have renewed their rivalry in a new arena — losing weight.

Reports say the singers, who have known each other since they were child stars on the Mickey Mouse Club, are still keeping an eye on the other.

That rivalry has reportedly re-emerged in the past few months, as Christina Aguilera has set on a weight loss campaign that’s gotten the attention of Britney Spears.

“[Britney] gets a huge thrill out of eclipsing Christina,” a source told OK! magazine.

Aguilera showed off her weight loss at a presentation of The Voice last month, but Britney has also been working to tone her figure. That’s apparently irked Aguilera, a source said.

“Christina has a chip on her should about Britney,” the source continued. “[Christina] was looking forward to rubbing her weight-loss in everyone’s faces — and Britney is at the top of her list. But it’s not worked out like she’s planned because Britney is back in top shape herself!”

It just happened to work out that Britney Spears and Christina Aguilera debuted their new fit looks in the same week, forcing the two to share headlines once again.

Tony Martinez, Britney’s personal trainer, said the singer has started a regimen of cross fit training to stay in shape.

“[It’s] a very tough workout involving a punishing series of weight-training exercises mixed with spurts of high-interval cardio,” Martinez explained.

Britney’s hard work was on display on the cover of Shape magazine.

It seems a bit incredible that Britney Spears was able to slim down as much as she has, especially given her lifestyle. Conservatorship documents for 2012 showed that the pop star spent a good deal of money at fast food restaurants, including McDonalds, Domino’s, Subway, and In-N-Out.