Music Daily: B.O.B. ft. Bruno Mars - Nothin' on You
Bruno Mars first number 1 hit isn't actually his solo single. He was featured alongside rapper B.O.B. for the song "Nothin' on You" from the latter's album "B.o.B Presents: The Adventures of Bobby Ray". It was admitted though that the song became very popular because of Bruno's part. It became a number 1 hit on US Billboard Hot 100, and certified 6x platinum. It was also a number 1 hit in UK Singles chart, going platinum. It charted at number 5 in European Hot 100 Singles.
Upvoted! Thank you for supporting witness @jswit.