Pop star Ariana Grande transformed the Grammys stage into a bedroom and slumber party.

Grande, who arrived at the ceremony in Sunday in a voluminous grey tulle dress, made numerous costume changes throughout the evening, reports variety.com.

Joined by an orchestra and a team of dancers wearing silky robes, the singer sang her hits -- "7 rings", "Imagine" and "Thank U next" -- that are featured on her album.

After singing "Imagine", she went into a version of "My favourite things" from "The Sound of Music". That segued into "7 rings", which samples the movie's song.

She is nominated in five categories, including Record of the Year, Album of the Year and Best Pop Solo Performance.

Last year, she was supposed to perform at the ceremony, but it didn't work out after producers declined to allow her to perform "7 rings".

An agreement had been reached in which Grande could perform the track as part of the medley, but the singer pulled out of the performance after producers insisted that the second song would be of their choice.