"Do It Again" is a song by American singer Pia Mia featuring fellow American singer Chris Brown and American rapper Tyga. It was released on May 4, 2015, through Wolfpack and Interscope Records. Mia recorded "Do It Again" in 2013, when she decided to sample J Boog's 2011 song "Let's Do It Again" after attending his concert in Guam. Brown and Tyga asked Mia to be included on the song when it was played in a studio session in 2014. It was written by Mia and Tyga alongside George Veikoso, Marc Griffin, and producer Nic Nac. "Do It Again" is a pop and R&B song, with a mix of hip hop and electronic dance music genres. The lyrics include references to Guamanian culture such as Two Lovers Point. Music critics described it as a "summer song".

Pia Mia Perez is an American singer, songwriter, and model. She began her career by posting videos of herself singing on the video sharing site YouTube, and went on to star in commercials and music videos. Pia Mia signed a recording contract with Interscope Records in 2013, subsequently releasing her debut extended play, The Gift, and a series of singles, including "Do It Again" and "Touch". In 2016, she was featured on will.i.am's single "Boys & Girls" which reached the top 40 in the UK Singles Chart. In 2017, Pia Mia independently released an EP entitled The Gift 2. Pia would later leave Interscope Records and become an independent artist in late 2017, creating her own label Cherry Pie Records. Pia briefly signed a record deal with Republic Records and Electric Feel Entertainment in 2020, before separating the following year.