The 19-year-old heartthrob was apparently feeling well enough Friday night to pull off his fourth and final show at London's O2 Arena, clad once again in his all-white blazer and pants with gold gloves and gold-accented hightops.
"still a little short of [breath] tonight but was an incredible show," Bieber tweeted afterward. "London fans go hard! 4 SOLD OUT O2 shows in a row!! #BLESSED."