What is the number one hit of black eyed peas?

The number one hit of the Black Eyed Peas is "I Gotta Feeling". The song was released in 2009 as the second single from the group's fifth studio album, The E.N.D. (2009). It was a commercial success, topping the charts in over 30 countries, including the United States, United Kingdom, and Australia. The song also won several awards, including three Grammy Awards and an American Music Award.