President Barack Obama cracked jokes and poked fun at rivals Saturday in his last appearance as US leader at the White House Correspondents' Association dinner, ending his performance with a mic drop and the words "Obama out." He poked fun at himself, the Democratic and Republican presidential candidates, and even reporters. He also spoke about how he had aged on the job and how in his final year, his approval ratings have been rising. "The last time I was this high, I was trying to decide on my major," Obama said, a reference to smoking pot in college. Here are the funniest bits: On Hillary Clinton "Here we are. My eighth and final appearance at this unique event," Obama said. "If this material works well, I'm going to use it at Goldman Sachs next year. Earn me some serious Tubmans." On Prince George Obama also made a hilarious joke about his meeting with two-year-old Prince George - son of Prince William and Kate Middleton - who showed up in a dressing gown to meet the US president. "It's not just Congress. Even some foreign leaders they have been looking ahead, anticipating my departure." "Last week Prince George showed up to our meeting in his bath robe. That was a slap in the face. A clear breach of protocol."