I doubt anyone is jealous, I'm very happy to NOT be in her position right now. Even back then, she was just a fake product meant to sell. She's nothing special; you even said it. She's a performer, not an artist. Anyone who has a sense of rhythm can be trained to dance like that, we've seen it all done before.
Honestly, that was shit to come back to - if she wants to do a "I'm back y'all!"-show, she should have done something big, something HUGE. And not right after getting out of rehab and all that legal trouble. Britney has always been crap but now she's at least entertaining thanks to all the problems and scandals in her life.
Mega boo @ Britney, I hope they'll throw stuff at her at the next show