Demi, 56, and Glenda, 60, posed for a photo together inside the bash. The actress wore a long sleeve black gown, and sported her signature sleek 'do.
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The momager and her beau have been dating since August 2014, but she previously revealed it's unlikely they'll ever marry.
Demi didn't need a man by her side! She had celebrity florist and close pal Eric Buterbaugh to keep her company.
What are your thoughts on the event? Sound off in the comments below!