With mere hours left to go until the Eurovision Song Contest gets underway on Saturday evening, the annual musical extravaganza has been thrown into chaos following an incident involving Dutch act Joost Klein.The performer, who qualified for the grand final earlier this week with his song Europapa, was “pulled” from rehearsing for tomorrow’s show “until further notice.” In a statement to the PA news agency, the European Broadcasting Union who televise the show said: "We are currently investigating an incident that was reported to us involving the Dutch artist. He will not be rehearsing until further notice.” "We have no further comment at this time and will update in due course." In preparation for the grand final, all 26 competitors have been taking part in a dress rehearsal ahead of the performance, however while Joost did appear during the Flag Parade, he didn’t perform his song Europapa when the time came.