The alleged incident involving Dappy, real name Costadinos Contostavlos, happened outside a nightclub in Chelmsford, Essex in the early morning hours of Thursday, 27 February.
A spokesperson from Essex Police said: "Costadinos Contostavlos, aged 26, from Sandridge, St Albans, has been charged with an assault by beating following an incident outside a nightclub in Moulsham Street in Chelmsford in the early hours of February 27.
"He has been released on bail prior to his appearance at Chelmsford Magistrates' Court on March 19."
No other details have been released.
Dappy has not referenced the alleged incident on his Twitter account, although he did give his followers a shout out this morning, saying: "I'd be nothing without my fans."
The N-Dubz musician, whose cousin is Tulisa, appeared on the January 2014 series of Celebrity Big Brother, finishing in runner-up spot to Jim Davidson.