Taylor Swift allegedly dissed One Direction star Harry Styles at last night's (February 10) Grammys.

The country-pop star opened the show in Los Angeles by performing her hit track 'We Are Never Ever Getting Back Together'.

However, she changed the lyrics for a section of the song and appeared to make a dig at Styles, who she had a fling with late last year before reportedly falling out.

Using an English accent for part of the line, Swift can be heard saying: "He calls me up and he's like, 'I still love you' and I'm like 'I'm sorry but I'm busy, opening at the Grammys'."

Twitter has been ablaze with comments from fans who believe the altered lyric and accent was intended to make fun of Styles.

The singer meanwhile won the Best Song Written For Visual Media Grammy for her track 'Safe & Sound'. Watch Fuse discuss Swift's show below: