Two men were remanded in custody in Britain on Thursday in connection with an alleged plot targeting soul singer Joss Stone.
Junior Bradshaw, 30, and Kevin Liverpool, 33, both from Manchester, are charged with conspiracy to rob and commit grievous bodily harm.
They were arrested in the Devon town of Cullompton on Monday, near the home of 24-year-old Stone, whose hits include "Super Duper Love' and "Fell In Love With A Boy', and who is worth an estimated 9 million pounds ($15 million).
Bradshaw and Liverpool spoke only to confirm their identities during the hearing, the Press Association reported.
They will next appear at Exeter Crown Court in western England on July 1.