Junior Bradshaw and Kevin Liverpool are on trial after planning to abduct and decapitate singer Joss Stone in June 2011.

The British singer shot to fame in 2003 when her debut album, “The Soul Sessions,” went multi-platinum. She won a Grammy Award in 2007 for Best R & B Performance by a Duo or Group with Vocals. She is also the fifth richest British musician under 30, The Sunday Times reports.

The motive for kidnapping Stone remains unclear, and the suspects deny charges of plotting to rob and kill the 25-year-old.

Bradshaw, 32, and Liverpool, 35, are said to have planned to dump the singer’s body in a river after decapitating her.

Their goal was to kidnap her at her home in Devon, and headed there armed with knives, a samurai sword, a hammer, gloves, and bags.

Neighbors saw the men driving around slowly however, and called police after suspecting criminal activity. The men never reached Stone’s house.

In the first day of proceedings at Exeter Crown Court this week, prosecutor Simon Morgan told a jury that handwritten notes were found in the defendants’ vehicle that allegedly revealed details about their plan.

E! Online reports that some of the sections read, "Jocelyn RIP" and "Once Jocelyn's dead ... find a river to dump her."

Though the motive for the murder plot remains unknown, Morgan stated that some of the notes describe the suspects’ displeasure with Stone being invited to the wedding of Prince William and Duchess Kate Middleton in 2011.

They may have sought a ransom or targeted Stone due to her ties to the royal family. The trial is still underway.

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