Throughout her career, Britney Spears has proved that she is a great dancer, but her recent performances have music fans a bit worried about the pop songstress. The 29-year-old's spark on the dance floor seems to be fading, with lackluster dance moves during her hugely-hyped 'Good Morning America' concert and her latest videos for 'Hold It Against Me' and 'Till the World Ends.'

Pop Dust recently created a video to give a visual break down of how much Britney's choreography has changed for the worse in recent months. In the video, clips are shown of Spears dancing now (aka her 'Femme Fatale' dancing days) versus then. One of the most alarming things is that the "then" they are referring to is less than 10 years ago.

In the video, viewers can see electrifying clips of Brit hitting hard during her heyday, however, this feeling of excitement quickly turns to concern and disappointment as the video changes over to her current 'Femme Fatale' style of dancing -- if you want to call rhythmic arm movement dancing.

It is obvious that Britney's energy onstage has greatly depleted recently, but this video really has us concerned about the pop singer. Watch for yourself and let us know what you think.