Taylor Swift is to be Maid of Honour for her best friend Britany Maack.

The 25-year-old singer has agreed to be by the side of her friend, who asked Taylor to perform the duties in a touching note from her ''sister''.

The note sent by Britany read: ''Taylor, You are more than a friend, you are more than a best friend. You are my sister. I cannot imagine having any one else by my side on my wedding day... Will you be my maid of honor? (sic)''

The 'Shake It Off' hitmaker posted the note on her Instagram page, in addition to a photograph of the pair when they were children and wrote: ''YEAH I WILL. @britmaack.''

Meanwhile, Taylor recently confessed she was ''so scared'' to meet Madonna at the Grammy Awards.

Taylor was worried Madonna would not live up to her expectations and refused to believe the 56-year-old star had heaped praise on her music.

When she was told about Madonna's positive comments, she said: ''Stop, I will pass out! You can't, don't be lying. Oh my God, I've been so scared to meet her, because it means too much to me.

''When she first said something nice about me in the press a couple of weeks ago, I was like, 'There's no way it's real, it' too good to be real.''