"No me Doy por Vencido" (English: I Don't Give Up) is a Spanish-language song by Spanish singer Luis Fonsi. It was released on June 2, 2008, for the promotional and charity compilation, AT&T TEAM USA Soundtrack. The music video of the song was released on YouTube in August 2008. It is one of the singer's biggest hit to date, breaking into the Billboard Hot 100.

After making its debut during Summer 2008, the song became a #1 hit on the Hot Latin Tracks in September. As of January 17, 2009, the song was at the top for 17 of the latest 19 weeks (only to be interrupted for two weeks in November by Luis Fonsi' Lloro Por Ti). It would not only hold off Lloro Por Ti from the top spot, but it would hold off other hits such as "Te Regalo Amores" by RKM y Ken-Y, "Dame Tu Amor" by Alacranes Musical, and "Como Duele" by Ricardo Arjona. It was a big success in Spain where it peaked at #4 and sold 40,000 copies. "No Me Doy Por Vencido" was named the fourth best-performing Latin pop song of the decade ending December 31, 2009.

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