Push is a song recorded by Avril Lavigne for her fourth studio album, Goodbye Lullaby. Avril's friend and former guitarist Evan Taubenfeld co-wrote the track with her, while Avril's ex-husband Deryck Whibley handled the production of the song. Taubenfeld also provided backing vocals on the song and lead vocals throughout the bridge. "Push" was released as a promotional radio-only single exclusively in Japan on February 20, 2012. It peaked at number 35 on the Japan Hot 100. Lavigne has stated that "Push" and "Goodbye" are her favorite songs from Goodbye Lullaby.
In a track-by-track commentary on her official VEVO account, Avril spoke about the meaning behind "Push", stating:
|“||'Push' is definitely one of my favorite songs on this record. All my girlfriends love it. It's a song... about fighting for love, believing in love, and when you're fighting, shut up and move forward and move along and let's do this because we love each other. ||”|
Prior to the release of Goodbye Lullaby, Lavigne confirmed her hopes to release "Push" as the second single from Goodbye Lullaby after "What the Hell".  On March 24, 2011, Lavigne asked her fans via Twitter which song should be the second single from Goodbye Lullaby, giving them the choice between "Push" and "Smile".  Most fans voted for "Smile", which was ultimately chosen as the album's second single. "Push" was rumored to be the third single for a long time, though, although Lavigne released "Wish You Were Here" as the third single instead and hinted that it may be the final single from the album, despite Lavigne's previous hinting that "Push" and "Black Star" would both be released at some point. Although "Wish You Were Here" was the album's final single, Lavigne released "Push" as a promotional single in Japan on February 20, 2012, where it peaked at number 35 on the Japan Hot 100. "Push" was also released as a one-track CD single exclusively in Japan in order to promote the single. 
Lavigne added "Push" to the setlist for her Black Star Tour. Most of the performances of the song were acoustic.
"Push" received mixed reviews from critics. Ben Ratliff of The New York Times and Adam Knott of Sputnikmusic both compared Lavigne's vocals on "Push" to that of fellow Canadian Alanis Morissette.  Jonathan Keefe of Slant Magazine criticized "Push," "Wish You Were Here," and "Smile", pointing that "all mistake having a potty mouth for having an actual personality."  Alex Lai of Contactmusic.com, however, gave a positive review of the track, calling it an "immediate improvement" from the album's previous track, "What the Hell".