Usher closed his URXTour at The O2 in London with a shout-out to his fans for helping him through "tumultuous times", Bang Showbiz reported. In 2012, Usher's former stepson, Kyle Glover, was taken off life support after being involved in a Jet Ski incident. The following year, the R&B singer's eldest son, Usher V, was hospitalised in ICU after he became stuck in a drain while swimming in a pool at Usher's home.The 36-year-old star told the crowd: "You know, it's been some time since I've been back here at The O2 and I mean, I feel this way most of the time, but I sense that no matter how many days, weeks, months, years pass - we always stay connected."And for that discipline or that support I thank you guys so much because this 23-year career of mine has [involved] a lot of different transitions."I've had some ups, I've had some downs, I've had some very tumultuous times and the things that help me to make it through that is your love and your support. Thank you, thank you for everything."Bang Showbiz reported that Usher blazed through a number of sure-fire crowd-pleasers, including Love In This Club, U Got It Bad, My Boo, Let It Burn and Confessions Part II before moving into his latest material such as Good Kisser.Usher then brought the show to a grand finale with a medley of his biggest dance hits - DJ Got Us Fallin' in Love, More, Without You and the 2002 single Yeah!Usher is set to release his eighth album, UR, later this year. ..