The prosecution is due to open its case today in the trial of former X Factor judge Tulisa Contostavlos who is accused of brokering a drug deal.
The former N-Dubz star, of Friern Barnet, north London, is charged with helping the Sun on Sunday's undercover reporter Mazher Mahmood obtain 0.5oz (13.9g) of a Class A drug for £860.
It is claimed that Contostavlos, 26, told Mr Mahmood, dubbed the ''fake sheikh'', that she could arrange for him to buy cocaine from her friend Michael Coombs, known as rapper Mike GLC.
Contostavlos, who is on bail, denies being concerned with the supply of cocaine to Mr Mahmood between May 20 and May 24 last year.
Yesterday, at London's Southwark Crown Court, Coombs, 36, of Enfield, north London, admitted supplying cocaine to Mr Mahmood.
He pleaded guilty to a charge of supplying the Class A drug on May 23 last year at the five star Dorchester Hotel in London's exclusive Mayfair district.
Bailing Coombs, Judge Alistair McCreath told the rapper he would be sentenced at the end of Contostavlos' trial.
He said: "Michael Coombs, I'll sentence you at the conclusion of the proceedings against your co-defendant, whatever that conclusion may be.
"In the meantime I'll permit you to keep your bail, but you must understand that that consists of no sort of indication as to what sentence you'll get at the end of it.
"On that understanding you may go."