"Nothing's Gonna Stop Us Now" is a song co-written by Albert Hammond and Diane Warren, recorded by the American rock band Starship in 1986. It is a duet featuring Starship vocalists Grace Slick and Mickey Thomas. Featured as the theme to the romantic comedy film Mannequin, it hit No. 1 in the Billboard Hot 100 on April 4, 1987 and reached No. 1 on the UK Singles Chart for four weeks the following month and became the UK's 2nd biggest selling single of 1987. The song also reached the top 10 in six European countries. The single became the first number one single by songwriter Diane Warren. At the time, it made Grace Slick (aged 47) the oldest woman to have a number one single in the United States though the record was later broken by Cher's "Believe" in 1999 (aged 52).

Answer this question based on the passage: who sings nothings going to stop us now? Let's have some stream of consciousness first.
This is the relevant information: "Nothing's Gonna Stop Us Now" is a song co-written by Albert Hammond and Diane Warren, recorded by the American rock band Starship in 1986. So, the answer is Starship.