5 Seconds of Summer's Michael Clifford has fired back at Abigail Breslin for her breakup song "You Suck"!

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After the actress tweeted against bullying, writing, "i mean calling each other ugly and stupid and gross for what? what is it worth? what do you gain from it?" another Twitter user accused her of doing that with her blistering diss track.

abigail breslin diss song

After she responded by calling it a "joke song," the 5SOS guy said he didn't find it very funny!

She didn't directly respond to his tweet, but she did throw shade at him.

She called him out for "hiding behind a screen."

Ouch! We guess they're definitely not friends anymore.

Do you think that Abigail's song was funny? What about Michael's response? Tell us in the comments!

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