It sounds like she's still struggling!

Selena Gomez reportedly indulged in a few too many beverages at the Vanity Fair Oscars party this past Sunday, and the singer didn't exactly hold her liquor well, Radar reports.

The "Come & Get It" chanteuse was accompanied to the bash by pal Vanessa Hudgens, and the brunette beauty enjoyed numerous champagne and hard liquor cocktails.

    "Selena was drinking constantly throughout the entire party when I saw her. She was having a grand old time and towards the tail end she was stumbling in her heels and almost toppled right over," an observer told the website.

The 21-year-old Spring Breakers star didn't embarrass herself too badly, but it was apparently obvious she can't handle her booze.

    "Selena and Vanessa were just having a really good time, laughing and taking pics. She wasn't slurring too bad, but was definitely in the happy-sleepy stage," the source added.

Justin Bieber's former lady love voluntarily admitted herself to an Arizona rehab facility in January, but it seems the stint did little to quell her wild behavior!