"Mundian To Bach Ke" (IPA: [mʊɳɖɪãː tõː bətːʃ keː]), also titled "Beware of the Boys (Mundian To Bach Ke)" or "Beware", is a bhangra music song produced by British musician Panjabi MC, with vocals and lyrics by Punjabi artist Labh Janjua.

A remix of the song, released in 2003 and featuring American rapper Jay-Z, also charted highly in North America and Australia.

The song sold an estimated 10 million copies worldwide, making it one of the best-selling singles of all time.

[1] In addition to features of bhangra music, "Mundian To Bach Ke" also uses the bass line and part of the beat from "Fire It Up" (1997) by Busta Rhymes,[2] which in turn is based around a sample from the television theme song for Knight Rider,[3] written by Glen A. Larson and Stu Phillips, as an underlying element and lyrics originally written by Channi Singh.

Outside these examples above, its massive popularity lent to frequent stereotypical use in western media as a auditory shorthand for introducing South Asians and/or aspects of their culture on screen.