Elton John has reportedly been hospitalised for a respiratory infection.The musician checked into Los Angeles’s Cedars-Sinai Hospital yesterday, according to TMZ.He is thought to have had a number of tests and may now have been released from the institution.However, John has allegedly been forced to cancel four concerts due to take place in Las Vegas this weekend.John is quoted as saying that not performing "feels strange”, adding: "I love performing the show and I will be thrilled when we return to the Colosseum in October to complete the 11 concerts."All I can say to the fans is, sorry I can’t be with you,” said John.