He has been accused of sexually assaulting a fan in 2001, when she was 17-years-old
The response follows a new docuseries which interviewed three of his alleged victims
He also said it "hurts" that he is no longer able to "make amends" with his brother
Carter denies the singer's claims
Shannon Ruth claims that the singer raped her on his tour bus in 2001
The Backstreet Boys star has branded the allegations as "factually impossible"
Carter's countersuit aims to out "an end to the smears and attempted shakedowns for good"
"Feel like we’ve been through some wars together," Nick sings on 'Hurts To Love You'
'A Very Backstreet Holiday' was due to air this week
It is claimed that the singer gave the alleged victim alcohol before attacking her on the group's tour bus
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