A Florida judge has upheld a $16 million (£10 million) ruling against 50 Cent in his legal battle over a failed headphone deal with Sleek Audio.

The In Da Club hitmaker partnered with company executives in 2011 for his own Sleek by 50 line, but the collection never materialised and he filed suit the following year (12) over allegations they did not refund his initial investment after the project fell through.

He then went on to launch an earphones line with rival firm SMS Audio, but that did not sit well with Sleek chiefs, who accused the rapper of stealing the designs for the over-the-ear products they had been developing together.

The two parties entered arbitration talks and a judge ruled in Sleek Audio's favour in April (14), ordering the superstar to give up his fight for the hefty fee.

50 Cent challenged the decision, but this week (begs06Oct14), Palm Beach County Circuit Judge Peter Blanc agreed with the arbitrator and refused to reverse the $16 million ruling.