According to MTV, the 24 year-old singer will provide back-up vocals to many songs performed by Federline. For Spears, it will be the first time she has recorded anything since the end of her Onyx Hotel Tour in 2004.
Kevin Federline, 27, will be releasing his hip-hop disc in the coming months. The exact date is unknown, but Federline is hoping that the CD will be on store shelves by spring.