Usher sings for Kim Kardashian during concert in Las Vegas (Photos)

Reality TV star Kim Kardashian visited Grammy Award-winning musician Usher's residency performance in Las Vegas over the weekend after having to postpone her trip to watch him perform in concert for many months.

During the performance, 42-year-old Kardashian sat in a VIP row with Allison Statter, a childhood friend, hairdresser Chris Appleton, and Appleton's reported fiancé, Lukas Gage.

Usher, 44, easily identified Kim in the group and at one point stopped to sing to her and her friends.

Kardashian posted a number of highlights from the event at the Park MGM Hotel on her Instagram Stories throughout the evening, including clips of her and her crew singing along to songs like "Confessions" and "My Boo."

Due to strong winds in Sin City in October, according to Kardashian, she missed Usher's "My Way" Vegas performance. She appeared in a tight black latex dress with narrow spaghetti straps on Sunday, April 23.