Celebrities are stepping up in a big way to assist with COVID-19 relief efforts.

On Tuesday, Philadelphia 76ers co-owner Michael Rubin launched his “All In Challenge” to raise tens of millions of dollars to provide food for Americans amid the coronavirus crisis. He has called on his friends in the sports, business, and entertainment communities to assist with the digital fundraising movement by donating once-in-a-lifetime experiences and items for auction.

Meek Mill was among the first to accept the challenge by donating his favorite car, his 2018 Rolls-Royce Phantom. “I’m in a position where I can help out,” said Meek, who challenged James Harden, LeBron James, and Floyd Mayweather.

Justin Bieber is also pitching in and offering to fly to the winner’s home and serenade them with his 2009 hit “One Less Lonely Girl.” “I think this could be a cool opportunity and it would be fun for me,” said the “Yummy” singer.

Yo Gotti is sweetening the deal by donating his Rolex Platinum President and luxury tour bus, complete with a master suite and two bathrooms.

Miguel will fly the winner to one of his shows, where they will get to spend the day with him and attend soundcheck and hang out backstage. The prize also includes accommodations in a five-star hotel and first-class flight tickets.

Other prizes include a speaking role in Kevin Hart’s next movie, a customized love ballad from Robin Thicke, and a private studio session with Timbaland. Fans can enter to win the once-in-a-lifetime experiences for as little as $10. All proceeds will be donated directly to non-profit organizations including Meals on Wheels, No Kid Hungry, and America’s Food Fund.