Which American singer features on the 2019 Little Mix hit single "Think About Us"?

"Think About Us" is a song by British girl group Little Mix from their fifth studio album, "LM5" (2018). A remixed version featuring American singer Ty Dolla Sign was released as the album's second and last single on 25 January 2019. It was written by Kamille, Goldfingers, Frank Nobel, Ty Dolla Sign and Victor Bolander, and produced by Kamille, Goldfingers and Louis Bell. The song peaked at number twenty-two on the UK Singles Chart and charted in eight other countries. It has since been certified platinum in Brazil and gold in Poland and the United Kingdom.

Little Mix are a British girl group. The group consists of Perrie Edwards, Jade Thirlwall, and Leigh-Anne Pinnock. One of its original members, Jesy Nelson, departed from the group in 2020. The group music style is of pop, R&B and dance-pop, with influences from other genres such as tropical house, Latin pop and electronic music.

Tyrone William Griffin Jr. (born April 13, 1982), better known by his stage name Ty Dolla Sign (stylized as Ty Dolla $ign or Ty$), is an American singer, songwriter and record producer. He first gained major recognition in 2010 for his feature on American rapper YG's single "Toot It and Boot It", which he had co-written and produced for Def Jam Recordings. In the summer of 2013, he signed a record deal with American rapper Wiz Khalifa's Taylor Gang Records. In November 2015, he released his debut studio album, "Free TC", which peaked at number 14 on the 'Billboard' 200.