Fullest is the fourth single by independent American rapper Cupcakke from her third studio album Ephorize.

The song was first released on January 5, 2018 on her album.^[3] The rapper announced via Instagram that if her post received 5,000 comments, she would release the video for "Fullest".^[4]

Madeline Laguaite from The Red & Black described the song as "a fun, fast-paced song that takes certain elements common to Latin music and incorporates them into the track. CupcakKe is full of confidence and self-assurance throughout the song, with lines like 'You can't ever make me look foolish' and 'my bank account look the fullest.' The track winds down with the post-chorus and a claim that 'them bitches still ain't the fullest.'"^[5] Jazz Scott from Tiny Mix Tapes claimed it to be bossa nova.^[1]

Harris released the music video for "Fullest" via her YouTube channel on February 20, 2018.^[6] Salvatore Maicki from The Fader described it as "vibrant and gloriously gaudy in all the ways a CupcakKe video should be" and went on to say "the 'Fullest' visual shows what really goes down when CupcakKe throws a house party— and what happens to sloppy uninvited guests."^[7] Dennis Hinzmann from Out wrote that "the rapper shows us what a house party for the Instagram generation looks like. Millennial pink palette: check. Inflatable pool animal: check. Neon backlighting to ensure everyone finds their best angle: check" and goes on to say "the party bumps around the rapper. That is, until some messy, uninvited guests show up. A coordinated withering glare followed by beachballs and squirt guns eject the would-be crashers, so the party can go on."^[8]