Keri Hilson is in the Big Brother House

AMERICAN music sensation Keri Hilson is set to “knock down” housemates in the Big Brother house to night.

Hilson is in the country to perform with six-time Grammy winner John Legend in three concerts billed for Cape Town, Durban and Johannesburg.

She will make an exciting two- hour appearance on Big Brother at 8pm.

The R&B-hip- hop star will surprise housemates and will perform two songs for them.

Hilson was named the Best New Artist at the 2009 BET Awards and Best R&B-Soul Act at the 2009 Mobo Award.

Her first album, In a Perfect World, won her international acclaim. Her singles Energy, Return the Favour, Turnin’ Me On and Knock You Down, in which she features Ne-Yo and Kanye West, saw her career skyrocketing.

Housemates’ bid to bring the spirit of soccer alive in the house last week was rewarded by a visit from SuperSport presenter Thomas Mlambo, who spent a week in the house.

When the reality show began, socialite and self- acclaimed Queen of Bling Khanyi Mbau and Channel O VJ Nonhle Thema also stayed in the house.

Now, after 40 days in the house, the number of housemates has been reduced from 25 to 14.