Jennifer Lopez's live performance of her new single "Do It Well," on the British talk show Parkinson, is a perfect antidote to the Britney Spears VMA Music Awards disaster. Lopez looks great, she works the stage and the crowd with cheery abandon -- and it actually sounds like she's singing live. Sure, this video clip does lack the David Lachappelle human-sized-Habitrail touch, but when Lopez keeps the beat pumping even a cappella, we're willing to forgive that oversight.

Is Amy Winehouse pulling a Britney Spears? The "Rehab" singer's performance at the MOBO awards may not have been quite the trainwreck that Spears's VMA debacle was, but it was certainly enough to raise some eyebrows.

Winehouse wasn't exactly helped any by the tacky she's-a-fuckup-but-we-love-her-anyway intro, but her glassy-eyed confusion during "Tears Dry on Their Own" and her mumble-mouthed incoherence on "Me and Mr. Jones" were what really sealed the deal. Also not helping subdue the chatter were the leaked reports of her backstage rider demands: two bottles each of Jack Daniels, Rioja, and Champagne, a large bottle of vodka, and two 24 bottle cases of Heineken.

Here's the thing, though: I'm all for spotting a celeb meltdown in the making, but, well, that's how Amy Winehouse always looks when she performs. I, personally, have never seen her clear-eyed or witnessed a performance where I could understand a damn word she was singing. She was already, at best, a bleary-eyed mushmouth, and at worst a woman in a steady drug-addled holding pattern. So I honestly don't know if she's really doing any worse than before.

Which begs the question: How do you know if someone's in a downward spiral if their normal standard of behavior is so far off from, well, normal?

Normally, we'd never accuse The White Stripes of being stale -- but if one note is the only note they're gonna play, then the label might stick. As part of their Canadian tour to promote "Icky Thump," Jack and Meg White are holding to a promise to play in every Canadian province and territory -- mostly through secret "One Note" shows, advertised mere hours ahead of time via their website.

Here, a crowd of excited Newfoundland fans witness Jack and Meg keep their word. No telling how long they had to wait for this one beat of music -- but given that the applause lasts longer than the performance, it seems that the crowd thinks it was worth it.

It's impossible to tell at this early stage whether Saturday's Live Earth concert mega-event will have the intended effect upon the planet's CO2 emissions. In fact, it seems to have already done substantive harm to the environment. And with 150 artists performing at eleven different venues, there's another kind of pollution generated as well -- the Internet video kind.

Honestly, It's a bit hard to know where to start. But Spinal Tap performed, and then they were interviewed, and that's the greatest thing ever. There's Chris Rock dropping a bad Paris Hilton joke and a F-bomb, to which the BBC reacts by leisurely cutting back to the studio fifteen seconds later. Shakira shook her hips in Germany, and if you've never seen Shakira shake her hips, then you've never seen Shakespeare the way it's meant to be done. And there are very few men in suits who can rock a mike like The Beastie Boys.

But my favorite video definitely has to be Madonna's feisty performance of "La Isla Bonita," as accompanied by two gypsy fiddlers and a pack of rambunctious dancers. Thanks to the blood red lighting scheme, there's a distinctly post-apocalyptic air to Madonna's whole set, but perhaps that's appropriate. Live Earth was a lot of things, but world-saving was not one of them.