Madonna performed the cover in Houston on Tuesday night
The US pop star has been posting festive social media messages
Singer blames organisers at SSE Hydro as technical problems hit her 'Rebel Heart' tour again
Singer has given evidence in a defamation case against 'Empire' TV show co-creator
Singer labelled her fans 'bitches' for complaining about her being a hour late
Singer blamed technical difficulties for the long delay
Singer covered John Lennon's 'Imagine' during acoustic mini-set
The singer revealed that she had almost cancelled her show, but decided not to
The show will take place at the city's Mercedes-Benz Arena tonight (November 10)
The incident occurred during the singer's show in Inglewood, California on Tuesday