Alexandra Burke
Alexandra Burke is said to have terminated her contract with RCA in May.

Alexandra Burke has become the latest star to fall victim to the 'X Factor Winners' curse'.

The 24-year-old singer, who was once described as 'the future of pop music', has split with her record label and si reportedly trying to relaunch her career as an RnB singer in the States.

Burke parted ways with RCA - her second label since her 2008 victory on the popular televison talent show - in May.

"The label being unhappy with Alexandra and Alexandra was unhappy with the label. There didn't seem any point in continuing," a source told the Daily Mail.

However, a RCA spokesperson confirmed the decision, saying in a statement: "We were in negotiations with Alexandra over continuing her relationship with RCA. However, the two sides had differing views over the best creative path for Alexandra to take. As a result, both sides have parted amicably."

Burke enjoyed initial success in the wake of her X Factor victory, when she was signed to Simon Cowell's Syco record label and released a series of chart-topping singles.

In 2011, she left Syco to sign a new record deal with RCA, where she teamed up with some of the people that helped turn Beyoncé and Rihanna into international stars.

Although she hoped the move would bring her closer to emulating the global success of another former X Factor winner, Leona Lewis, she has struggled to sell records.

Burke's last album Heartbreak On Hold only peaked at number 18 when it was released last June and sold a paltry 6,731 copies.

But despite her latest setback the London-born songstress told fans she was pushing forward with her career.

"Working hard in the studio creating something special for my fans which is coming soon :)," she tweeted.

Burke is now rumoured to be working with Kevin Liles, the former president of Def Jam records and mastermind behind the careers of Jay-Z and Kanye West.

She is not the first winner who has struggled to achieve longevity in the music industry after taking the X Factor crown.

The show's first-ever winner, Steve Brookstein, was dropped by Sony just eight months after his victory on the talent contest in 2004.

Most recently 2009 winner Joe McElderry left Sony two years after winning the show and 2010 winner Matt Cardle jumped the Sony ship after just 18 months.