‘Real Housewives Of Beverly Hills' Kyle Richards Rings In 50th Birthday With Sister Kathy Hilton

Kyle Richards turned the big 5-0 on January 11, and she celebrated the milestone on a high note. The Real Housewives of Beverly Hills star belted out some of her favorite songs at the party. Keep reading for more details.

It seems like Kyle and her sister Kathy Hilton have made a truce. Their relationship has had its ups and downs, with the sisters feuding over things like Kyle's show American Woman, among other things. Kathy was seen on social media singing at the party.

Most of her RHOBH costars made it to the festivities: Lisa Rinna, Erika Girardi, Teddi Mellancamp, Dorit Kemsley were all there and joined in on the fun as they rocked out to some of the '80s most popular hits. The group shared some of the shenanigans on social media. Her BFF Faye Resnick was also there.

Noticeably absent was the birthday girl's former bestie, Lisa Vanderpump. Their feud has played out on camera this season and LVP has not exactly been on good terms with any of the wives.

Kyle loves to show off her singing and dancing skills. While in Mexico, she and Teddi jammed in the pool to "Life Goes On," the hit sung by Teddi's father, John Mellancamp.

She also seemed to be soaking up the rays as she entered the new decade of her life. Days before her big party, she shared this picture of her lying on the beach, showing off those taut abs in a bright yellow bikini.