Ever think you'd hear President Obama and Lindsay Lohan mentioned in the same sentence? Neither did we. But Lohan attended the 98th Annual White House Correspondents' Association Dinner on Saturday night and managed to show up Kate Upton and Kim Kardashian!

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The no-longer-on-probation actress looked stunning in a plunging black halter gown, with her hair dyed back to her signature red hue. So is the event just an excuse for the President and First Lady to mingle with celebrities? Well ... not really. Proceeds from the dinner go toward scholarships for aspiring journalists and awards recognizing excellence in the profession. It is traditionally attended by the President and First Lady as well as many other senior government officials and members of the press corps.

They may have looked glamorous, but Lohan and Kardashian also had to handle being the butt of several jokes. Referring to "Miracle on the Hudson" pilot Sully Sullenberger, who was in the audience, host Jimmy Kimmel joked, "Sully, will you drive Lindsay Lohan home? Just make sure you don’t run into a goose, and make sure it isn't a Grey Goose."

He also took aim at reality queen Kim Kardashian. "If you're looking for the greatest threat to America right now, she's right there," he said, pointing into the audience. "She's Kim Kardashian."

The President himself also made a Kardashian joke, in a pre-taped opening bit. "Seriously, guys, what am I doing here?" he said. "I'm the President of the United States, and I'm opening for Jimmy Kimmel? ... Why am I telling knock-knock jokes to Kim Kardashian? What is she famous for, anyway?"

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From Lohan to Kardashian to Upton to Sofia Vergara, let us know: Who was the sexiest celeb at the White House Correspondents' Association Dinner?