It's been a busy week in the world of celebrity fundraising, with both Michael J. Fox and Leonardo DiCaprio throwing big parties and drawing big names to support causes close to their hearts. 

At his annual "A Funny Thing Happened on the Way to Cure Parkinson’s" fundraiser, Michael J. Fox entertained a big turnout that included celebs like Blake Lively, Ryan Reynolds, Julianna Margulies, Joan Jett, Mario Batali, Seth Meyers, and Tina Fey. The highlight of the evening was Fox's reprisal of his classic "Johnny B. Goode" performance from "Back to the Future" with support from Coldplay's Chris Martin. 

"I think the awareness we've raised has been crucial in focusing toward finding a cure and being a proactive part of finding an answer," Fox told The Hollywood Reporter.

You can check out a recording of the actor's performance with Martin below. 

Meanwhile, over at New York City's exclusive hotspot TAO, Leonardo DiCaprio celebrated his 39th birthday just as he has in the past - with famous names, lots of champagne, and a focus on raising cash for charity. Guests included Martin Scorsese, Orlando Bloom, Alex Rodriquez, Derek Jeter, Tobey Maguire, Nicky Hilton, and performances by Kanye West and 2 Chainz. 

Just like previous years, Leo raised the prices on everything from water to liquor - with all of the extra cash benefiting his Leonardo DiCaprio Foundation. The evening's festivities, which included a special auction of two bottles of Moet & Chandon Grand Vintage 1921, (featured in "The Great Gatsby"), and a one-of-a-kind, handcrafted Roségold Mathusalem of Dom Pérignon, raised more than $3 million. 

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Michael d'Estries ( @michaeldestries ) covers science, technology, art, and the beautiful, unusual corners of our incredible world.

Charity beat: Michael J. Fox rocks out, DiCaprio parties on
In separate events, both actors rallied the support of their famous friends to raise millions for Parkinson's research and environmental charities.