AMERICAN music sensation Keri Hilson is set to "knock down" housemates in the Big Brother house tonight.
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 andKnock 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.