15Tareq and Michaele Salahi (The White House Crashers)
In 2009, these Washington socialites attended a White House state dinner for the Indian Prime Minister... Without a ticket. They were filmed smiling alongside numerous dignitaries including President Obama.
Turns out, these gatecrashers had celebrity in mind. Their preparations for the crash were even filmed and later used on The Real Housewives of D.C. Although the camera crew wasn't allowed in, the couple got past two checkpoints without incident. Security later claimed they let the couple in because ‘they looked the part’. Confidence is always key to a party crash.
The security breach created a firestorm in Washington, and it was ignited by the Salahis' own public confessions of their exploits to the press. The pair were forced to appear before the U.S. House of Representatives’ Homeland Security Committee. They pled the Fifth.
Don't expect any more gate crashing from the couple, though; they have since divorced.