"Count On Me" is a song by American singer-songwriter Bruno Mars from his debut studio album, Doo-Wops & Hooligans (2010). The song was first unveiled on Mars' debut extended play, It's Better If You Don't Understand (2010). The song was released as a radio single in Australia and served as the overall fifth single from Doo-Wops & Hooligans, being serviced to contemporary hit radio and adult contemporary radio in Australia on November 7, 2011. It was composed by Mars, Philip Lawrence, and Ari Levine, under their alias, The Smeezingtons. Musically, "Count On Me" is a folk and tropical record that lyrically details the importance of friendship and convey a positive message.

It received generally mixed to positive reviews. Some music critics noted the resemblance to "Over The Rainbow" by Israel Kamakawiwoʻole, praising its arrangement and "uplifting" vibe, others criticized its "saccharine sound" and cheesy lyrics. The single peaked at position at number two in Czech Republic and it was able to reach the position of 19 in Australia and 13 in New Zealand. Mars performed "Count On Me" on television shows such as The Ellen DeGeneres Show and included it on both of his worldwide tours The Doo-Wops & Hooligans Tour (2010–12) and once on the Moonshine Jungle Tour (2013–14). The song has been covered a number of times and has been used in a couple of commercials.

"Count On Me" was written by Bruno Mars, Philip Lawrence and Ari Levine, while production was handled by the same three under their alias, The Smeezingtons. The song was recorded at Larrabee Recording Studios in Hollywood and Levcon Studios in Los Angeles, with Levine being responsible for engineering it at the latter studio. The track was mixed by Manny Marroquin and assistants Christian Plata and Erik Madrid. Levine and Mars played and recorded all of the instruments on the track. Stephen Marcussen mastered the recording at Marcussen Mastering in Los Angeles. "Count On Me" was issued to contemporary hit radio and adult contemporary radio on November 7, 2011, in Australia by Atlantic Records and Warner Music Australia as the fifth single.

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