Cher is suing Mary Bono!

You don’t mess with Cher.

Mary Bono, widow of Cher’s ex-husband and former professional partner Sonny Bono, really outa know that.

The Los Angeles Times reports: Cher filed a $1-million federal lawsuit Wednesday against former Rep. Mary Bono, a trustee of the Bono Collection Trust, and other individuals, accusing them of breach of contract. The 75-year-old entertainer claimed that Bono’s fourth wife has tried to terminate provisions that entitle Cher to 50% ownership of the duo’s musical composition royalties, record royalties and other assets from their marriage.

Read the full story HERE.