Jennifer Lopez sways enthusiastically at Usher, Adele's Las Vegas concerts

Jennifer Lopez extends her support to both pals Usher and Adele in Las Vegas.

The 54-year-old Play singer uploaded an Instagram montage of her dancing and singing-filled Friday and Saturday nights on Monday.

Let's beginning with Lopez's Friday night performance at Usher's My Way residency in Las Vegas. As she joined the throng in singing the chorus to Usher's smash song Burn, Lopez seemed to be having a fantastic time. She danced while sipping a beverage and held up the torch light on her phone.

As rapper Nas joined Usher on stage, the actress passionately moved to the music and wrote in the description of her clip, "Until Next Time Vegas..."

The singer joyfully sang along to Adele's Someone Like You at her Weekends with Adele residency on Saturday night. The video then shows Adele marching through the crowd and saluting Lopez before yelling, "Love you J.Lo," after she got back on stage. Lopez then wrote back, "Love you too Adele!"

The Marry Me actress wore a stunning white cropped top and black high-waisted trousers on Friday night, while on Saturday she wore a beautiful black gown.

One user commented under her post, "I just imagine those people going to see usher and Adele and you right there in the crowd ahhhhh double treat."