By Selena Hill (staff@latinospost.com) | First Posted: Sep 23, 2013 04:55 PM EDT

Rumors of a divorce between Khloe Kardashian and Lamar Odom continue to pile up after the reality star dropped the "Odom" from her Instagram name on Sunday in the midst of various reports concering Odom's alleged drug addiction.

The couple has seemingly been going through a serious rough patch in their four-year marriage since Odom was arrested on the suspicion of driving under the influence recently. Odom is also rumored to have checked himself in and out of rehab for substance abuse last month. In addition, Hollywood Life reports that the NBA star has moved out of the family home he and Kardashian shared. 

Over the weekend, Khloe took a drastic step that may symbolize she's through with her husband by removing Odom from her Instagram name. Previously, her name on the popular social media site was Khloe Kardashian Odom, but she cut it down to just "Khloe" in her bio.  

The reality TV fixture has also has been doing everything she can to stay positive--or distract herself from her tumultuous marriage. On Saturday, she was photographed with three of her sisters at Miley Cyrus' performance at the iHeartRadio Music Festival in Las Vegas. [See photos.]

The Kardashian crew also posed for a picture with the fishnet-wearing Miley who gave a wild and racy concert. While Miley was barely dressed, the sisters looked ravishing in matching black leather outfits. Khloe, who was noticably still wearing her wedding wing, was glowing in a tight black leather dress with a midriff cutout that hugged her curves. Kourtney rocked an all-black outfit with a pair of flare pants and a shirt with the words, "Like A Virgin" on it, Kendall wore a short black, jagged-edged skirt with a white top and Kylie rocked a black leather button-down dress. 

Meanwhile, Lamar Odom is reportedly still avoiding long-term rehab. To top it off, their four-year anniversary on Sept. 27 is slowly approaching.