"Hothouse" is a song by American band 78violet. It is their first single release since their renaming from Aly & AJ in 2009 and only single released under the name before they returned to Aly & AJ in 2016. It was released on July 8, 2013. The song was written by sisters Aly and AJ Michalka, and Mike Einziger (of the band Incubus), while production was handled by David Kahne.
The folk-pop song introduces the public to a new psychedelic sound from the duo that strays from their commercial pop rock roots. "When you hear it, it kind of takes you a little bit back to the '60s, '70s and has that throwback sound as well as the female strength," older sister Aly, 24, told MTV News.
Immediately after the single's release the duo began promotion. On June 26 the girls performed their first concert in five years at the Roxy Theater in West Hollywood. The duo appeared in several interviews, beginning with ClevverNews where they discussed the single and album. The day of the release they interviewed on Huffpost live with Ahmed. On July 9 they hosted a concert in New York City at the Gramercy Theater. The duo also performed "Boy" and "Hothouse" live on Billboard's Tastemakers. Along with a performance on Vevo. During this time the duo would be nominated for "Best Siblings in Pop" on Popdust and would single-handedly beat out the Jonas Brothers, the McClain Sisters, and Chord and Nash Overstreet.