18-year-old Abigail Breslin is all grown up already. The last we remember her was from 'Little Miss Sunshine'. Now she's writing songs, and this one is titled 'You Suck' and directed to a 5SOS singer.

The song is rumored to be aimed at Michael Clifford of 5 Seconds of Summer.

Her song is kinda harsh.

Like Taylor Swift-level but harsher.

She really doesn't hold back.

This is Michael Clifford.

And the biggest burn:

Check out the music video: