Coachella 2014: Pharrell Williams brings out Jay Z, Usher, T.I., Pusha T and more – Daily Bulletin
Pharrell featuring Jay-Z – Frontin' (2003, CD) - Discogs
Pharrell Williams feat. Jay-Z - Frontin
Beats & Rhymes: Pharrell & JAY-Z on TIDAL
Pharrell Williams Hosts Jay-Z and Clipse at First Louis Vuitton Menswear Show
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Pharrell feat. Jay-Z - Frontin'
Frontin' sheet music for voice, piano or guitar (PDF)
Frontin' - Wikipedia