Two original members of '90s R&B group En Vogue are being sued for more than $310 million by Rufftown Entertainment, which claims they violated an exclusive recording contract by signing with another label following a stalled comeback attempt. 

The suit, filed Wednesday in Los Angeles Superior Court, alleges breach of contract, negligence, interference and fraud.

The group formed in Oakland in 1989 and recorded a number of hits over the next few years including My Lovin (You're Never Gonna Get It) ...