EXCLUSIVE: Gigi Hadid and Zayn Malik Are Back Together After Split: She's 'Obsessed' With Him, Source Says

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While this is quickly becoming the summer of celebrity splits, one of Hollywood's most gorgeous couples appears to have reconciled. For now, at least.

Gigi Hadid and Zayn Malik are back together, a source close to Hadid tells ET. However, the relationship is reportedly still rocky.

"Yes, they're back together, but could be over again in any second," the source says.

WATCH: Gigi Hadid Shares Cryptic Snaps After Zayn Malik Rumored Split, Steps Out in Skimpy Style for Night Out With Jenner Sisters

But it looks like the 21-year-old supermodel is pretty enamored with her former boybander beau.

"Gigi is obsessed with Zayn -- she won't let go of him too easily," the source adds.

Rumors that Hadid and 23-year-old Malik had broken up swirled earlier this month, however, the model appeared to debunk the reports last Friday, when she referenced her "boyfriend" while speaking with Elle. When asked whether she prefers a night out or night in, Hadid replied, "Night in. Cook. Paint. Play with my dog. Hang out with my boyfriend. Watch movies. Just chill."

Tellingly, she also lip synced to Malik's hit, "Pillowtalk," when she hosted the Maybelline New York Beauty Bash at the Line Hotel in Los Angeles on Friday.

An eyewitness told ET that Hadid went up to the DJ booth, where it appeared that she herself requested the song. Once it started playing, she reportedly insisted that the DJ turn it up twice as loud.

NEWS: Gigi Hadid Photographed With a New Man -- and Kids! See the Adorable Pic

Malik and Hadid have been dating since last November. Their last public appearance together was at the Met Gala in May.

Watch the video below to see the two looking crazy in love -- and beautiful -- in a romantic Vogue photo shoot in April set in Naples, Italy.