Ibiza isn't just an island to go party on, it's a nightclub in D.C. and it had its share of inauguration parties this week.  The big boy belonged to the RIAA/Feeding America Inauguration Charity Ball hosted by Rihanna. The RIAA stands for the Recording Industry Association of America, the trade group that represents the U.S. recording industry. Guests included Rihanna, Courteney Cox, David Arquette, Leonardo DiCaprio, Kanye West, Cher, T.I., Shakira, Josh Groban, Herbie Hancock, Lilly Collins, Mitch Bainwol (Chairman & CEO, RIAA), Vicki Escarra (President and CEO, Feeding America), Sara Gore and many more.

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