The prosecution in the trial of Kevin Liverpool, 35, and Junior Bradshaw, 32, is reading a series of text messages sent from Liverpool to someone called Junior Judge. Two of the messages read:
I'm looking to take out Jocelyn [Joss Stone's real name] now and set it off ... Let's do this thing, make a move.
Make the move on Tuesday morning. I want the soldiers here by 1230. I want you to make the move. Make sure you get that car.
Kevin Liverpool and Junior Bradshaw, both of St Stephens Close in Manchester, stand accused of conspiring to rob, murder and commit grievous bodily harm against Joss Stone.
Both deny all the charges.
More top news
Mack entered her plea in federal court in Brooklyn. The judge refused a request by her lawyers to release her without bail.
Officers investigating a reported break-in on Friday found 22-year-old Roger Alvarado asleep in the pop star's home in Tribeca.
Billy Jeeves is said to have fled the scene in Hither Green, south-east London, after Henry Vincent was fatally stabbed by the pensioner.