Hot Baby

"Pitapat" (Korean: 두근 두근; RR: Dugeun Dugeun) was released on July 12, 2013 as Bestie's debut single. It was composed by Super Changddai with production by Will Simms and Tom Havelock.[2] The song's music video, which features comedian Yoo Se-yoon and 2AM's Jo Kwon, has been noted for its "fanservice shots" and "flirty" choreography.[2] Corynn Smith of MTV K gave the track a positive review, calling it "ear-worm-y" and highlighted its production team.[2]

In South Korea, "Pitapat" debuted at number 126 on the Gaon Digital Chart for the week of July 7 to July 13, 2013,[3] with 18,220 copies sold.[3] The next week, the single jumped to its peak position of number 84.[4] "Pitapat" charted for a total of four weeks, selling 42,588 digital downloads in the month of July.[5]

A remix of "Pitapat" was included on Bestie's debut mini-album, Hot Baby.

"연애의 조건" ("Love Options") was released as a second digital single on October 16, 2013, followed by "Thank U Very Much" on February 28, 2014. The song was written and produced by Duble Sidekick, with additional arrangement by Radio Galaxi.[6] The single debuted at number 118 on the Gaon Digital Chart,[7] selling 19,116 copies in its first week.[7] On the Billboard Korea K-pop Hot 100, it debuted at position 74 on the issue dated March 5, 2014.[8]

"별처럼" ("Like a Star"; Byeolcheoreom) was released as a digital single on July 11, 2014.

The Hot Baby mini-album was released on July 28, 2014, along with its title track. In addition to the title track and two other new songs, the EP included the previously-released digital singles "Love Options", "Thank U Very Much" and "Like a Star", along with a remix of "Pitapat."

A digital-only repackaged version of the mini-album entitled I Need You was released on August 29, 2014 with a new track produced by Duble Sidekick and Homeboy.[9] The title track served as the promotional single for the new version.