"Won't Back Down" is a song by American hip hop artist Eminem, featuring American pop singer Pink, recorded as the fourth track on his seventh studio album Recovery (2010). It features production from Aftermath Entertainment producer DJ Khalil, who helped write the song along with Eminem, Erik Alcock, and Columbus "Rahki" Smith.

Upon the release of Recovery, the song received generally positive reviews from music critics, who praised its aggressive nature and production. Although not released as a single, "Won't Back Down" appeared on four national charts. It was used in the video game Call of Duty: Black Ops and its trailer as well as the trailers for the films and Hitman: Agent 47. It was performed on Saturday Night Live and Late Night with Jimmy Fallon.

"Won't Back Down" was written by Eminem, DJ Khalil, Erik Alcock and Columbus "Rahki" Smith. Along with most of the songs from Recovery, "Won't Back Down" was recorded at 54 Sound and Effigy Studios in Ferndale, Michigan, with recording carried out by Mike Strange. The song is one of the few Eminem songs not in a 4:4 time signature, along with Untitled (also from Recovery) and Underground (from Relapse). Originally, the song was set to be a solo record, with Eminem singing the chorus himself. Later, Liz Rodriguez, who is also featured on Recovery's "25 to Life" and "Almost Famous", recorded the song's chorus. Eminem however, explained in an interview that after recording his vocals for the song, he decided to include Pink on the song as he "felt like she would really smash this record." Rahki co-produced the song with Khalil.

Although "Won't Back Down" was not released as a single, it charted on four national charts worldwide due to digital sales on the release of Recovery. The song reached its highest position on the US Billboard Hot 100, where it peaked at number 62 on the chart for the week ending of July 10, 2010, although it fell off the chart the following week. The song also charted in Australia, Canada and the United Kingdom, peaking at number eighty-seven, sixty-five and eighty-two on their respective national charts, although on all three the song again only appeared for one week.

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