Honestly Britney chose the perfect song to cover and make her own. Sounds like she was really wanting to do this song. I find it very artistic and fresh. I mean imagine this live or as a music video. It's just the perfect change up song for Brit. She's NEVER done something like this.
At people not liking the effects on this (and on It Should Be Easy) when she sounds a MILLION times more into this song than a certain Womanizer. Get ya **** together.