As a music producer, will.i.am has produced with other artists including Cheryl, Michael Jackson, Justin Bieber, Kesha, Britney Spears, Miley Cyrus, David Guetta, U2, Rihanna, Lady Gaga, Usher, Justin Timberlake, A. R. Rahman, Nicki Minaj, 2NE1, and Baby Kaely. In collaborations and with the Black Eyed Peas, he has a total of 41 top-40 entries on the UK Singles Chart since 1998, and has sold 9.4 million singles in the UK.