"Mmm Yeah" is a song by American pop singer Austin Mahone from his debut EP The Secret. The song features vocals from Cuban-American rapper Pitbull. The song was released in the United States as a digital download on January 26, 2014. The song's chorus samples the song "Nu Nu" by Lidell Townsell. The song peaked at number 49 on the Billboard Hot 100. The song is featured in the closing credits of X-Men: Days of Future Past.

"Mmm Yeah" is a dance-pop song which contains(the same words over and over again) a "swirling" production, funk-influenced trumpets, a percussion-heavy four on the floor electropop beat, and influences of Chicago house, hip hop, and Latin music. It is written in the key of G♭ minor. The track heavily samples lyrics from Lidell Townsell's 1992 single "Nu Nu", especially in the chorus. Lyrically, the song speaks of being rejected by an attractive woman walking down a street: "We can do whatever/ Do whatever we want/ When she walked past me I said 'hey, hey, hey' So tell me where you from where you want to go/ She walked past me like I ain't say a word".

The lyric video, directed by Rocco Valdes, Dan Roof and Tomás Whitmore, was released on January 31, 2014, and features appearances by Nash Grier, Cameron Dallas, Sam Pottorff, The Janoskians, Keira Knightley, Midnight Red, Stalker Sarah, King Bach, Teala Dunn, Madison Pettis, and Mahogany Lox. The lyric video was nominated at the 2014 MTV Video Music Awards in the "Best Lyric Video" category.

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