By Taylor Weatherby
February 10, 2015 at 05:53 PM EST
Scott Legato/Getty Images; Daniel Boczarski/Redferns

Although it was Beck who was nearly interrupted by a classic Kanye West move at Sunday’s Grammys, Shirley Manson wants to give the rapper a piece of her mind.

The Garbage frontwoman wrote an open letter to West on her Facebook page Monday, calling him out for “making a mockery of all musicians,” including himself. Using words like “petty” and “spoilt,” she tells West to grow up and ends her letter with a mention of Beyoncé. Read the full letter below.

Dear Kanye West

It is YOU who is so busy disrespecting artistry. 

You disrespect your own remarkable talents and more importantly you disrespect the talent, hard work and tenacity of all artists when you go so rudely and savagely after such an accomplished and humble artist like BECK. 

You make yourself look small and petty and spoilt.

In attempting to reduce the importance of one great talent over another, you make a mockery of all musicians and music from every genre, including your own.

Grow up and stop throwing your toys around.

You are making yourself look like a complete twat.

Ps.I am pretty certain Beyonce doesn’t need you fighting any battles on her account. Seems like she’s got everything covered perfectly well on her own.