DT2 / WENN 1 / 18

R&B singer Ne-Yo has been caught up in legal trouble with his ex after allegedly breaking their confidentiality agreement.

RELATED: Celebs in trouble with the law in 2012

Ne-Yo initially believed he fathered a child with his former lover Jesseca White and he turned over $575,000 in custodial support in 2009.

RELATED: Ne-Yo is engaged and expecting second child

A paternity test later confirmed the 33-year-old was not the child's biological parent and they reportedly reached a settlement banning both parties from discussing the matter with the press.

RELATED: Usher's highs and lows

But Ne-Yo, real name Shaffer Smith, opened up about the ordeal during an interview with VH1's "Behind the Music" in September , and now White has accused him of breaking their legal gag order and defaming her character.

Her attorney, Gloria Allred, has fired off a letter to the star, alleging White has been unable to work and forced to seek financial aid because she is "beset by nausea, vomiting, and hair loss" as a result of his comments.

White is seeking to settle the matter amicably out of court, according to TMZ.com