Jennifer Aniston dropped $450,000 on a painting by red-hot artist Glenn Ligon Thursday at Ben Stiller and David Zwirner’s Artists for Haiti charity auction at Christie’s. Aniston sat front-row with boyfriend Justin Theroux, who dutifully handled paddle duties during the bidding, which set a record for a Ligon work. Stiller also went to town, picking up works by Nate Lowman, Jeff Koons and Martin Kippenberger, while John McEnroe got into the act by walking away with a drawing of Jay-Z by Elizabeth Peyton. “People were clapping and cheering, which rarely happens at art auctions,” said a spy. “The auctioneer was right out of central casting, and she was joking with Ben in the front row.” The auction brought in $13.7 million. Zwirner’s wife, Monica, designed a tote under the MZ Wallace label to further benefit Haiti. And Bill Clinton was scheduled to join a celebration for the Stiller Foundation last night. Aniston and Theroux celebrated afterward at downtown restaurant Il Cantinori.