"Arms" is a song by American singer-songwriter Christina Perri. The song was written by Perri herself, and serves as the second single from her debut album Lovestrong (2011). The song debuted on the Billboard Hot 100 at number 94. The song's accompanying music video debuted on April 28, 2011 on VH1.

"Arms" was written by Perri with musical arrangements from J. Barrera. The song was released onto iTunes March 15, 2011 and was additionally released in a karaoke form, the same day as the single release.

Like previous single "Jar of Hearts", "Arms" is built around a piano melody. Although the song "packs a little less venom" than Perri's lead single, it still lyrically contains the "crazy" lovesick emotions typically referred to Perri's style of music. The song begins as a slow love song and transgresses into an up-tempo track as kick-drums enter the song midway through. Lyrically, Perri begins the song in a happy tune, singing "I never thought that you would be the one to hold my heart / You came around and you knocked me off the ground from the start." More into the song, Perri begins to question the relationship, ultimately finding comfort as she ends the song repeating the hook. "Arms" progresses from a folky ballad to a nicely paced melodic love song, incorporating timpani drums.

Perri described the song in depth, stating "'Arms' is about the fight between your heart and your mind. Your heart wants to be loved but your head is always telling you reasons not to be with him or her, or how you are not worth the love. It's about the struggle and finally giving in when you're wrapped in their arms. Then you get it. Then you feel loved and love wins."

"Arms" garnered generally positive reviews by critics, most of which favored the change in pace for Perri, who took a happier pace with the song. On the day of the songs premier, AOL Music compared the song to that of Ingrid Michaelson and Natalie Merchant. While reviewing the album, Kyle Anderson of Entertainment Weekly listed "Arms" as a mandatory download from the album, calling it "chimming". A.D. Amorosi of The Philadelphia Inquirer enjoyed Perri's hushed voice and changing backup spare arrangement on "Arms". Stating that the song is filled with "dusty gallop of guitar and jangling piano", Chad Grischow of IGN stated that the song pushes Perri innocent and melodic vocals which makes for one of the better love songs off Lovestrong.

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