Gomez, in a little black dress, shared a photo from the bash with a sweet caption for Bloom, reported People magazine.
"Happy bday Orly - celebrate kindness and who you are," the 23-year-old wrote.
Most recently, she and Bloom both attended the Golden Globes afterparty.
Back in April 2014, the pair were romantically linked after they were spotted at a comedy show together.
That same year in July, Bloom and Gomez's ex Justin Bieber allegedly got into an altercation over the father of one's ex-wife Miranda Kerr.
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