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Nina Dobrev, Orlando Bloom

Jason Kempin/Getty Images for Playboy

Nina Dobrev had quite the busy weekend at Comic-Con in San Diego!

The 25-year-old Vampire Diaries star sparked several romance rumors the past few days after hanging out with not one, not two, but four hunky actors!

On Friday night, Dobrev was spotted flirting with Orlando Bloom at the Playboy and A&E Bates Motel event. While the there wasn't any kissing of major PDA, the hot stars did chat, share some laughs and posed for pictures together. "They seemed connected like magnets," a party source tells E! News. "They were canoodling [and] he had his arm around her."

Despite some innocent flirting with Bloom, a source tells us, "Nina is loving single life. She is definitely enjoying herself right now."

Nina Dobrev, Benjamin McKenzie

David Tonnessen/PacificCoastNews

But Bloom wasn't the only hunky guy Dobrev hung out with this weekend. She was also spotting getting close with Benjamin McKenzie! Dobrev and McKenzie attended Entertainment Weekly's 2014 Comic-Con Celebration at Float at Hard Rock Hotel Saturday night. After the bash, the duo was spotted hugging and getting close before hopping into a taxi together.

Meanwhile, Dobrev also hung out with Baby Daddy hunk Derek Theler. "Both were with other friends and everyone was just hanging out having a good time," a source dished of the pals. That good time included doing a shot together at the bar.

Nina Dobrev, Paul Wesley, Ian Somerhalder, Kat Graham, Matthew Davis, Comic-Con

Mark Davis/Getty Images

But that's not all. Last but not least, Ian Somerhalder's ex hit up Evolve Media's Crave Online party, featuring MGMT performing, with Once Upon a Time actor David Anders, who actually played her father on TVD.

As for Somerhalder, he and new gal-pal Nikki Reed packed on the PDA Saturday night at a Comic-Con party. "They were so together," an insider told E! over the weekend. Another source said that Somerhalder and Reed "were hot and heavy," adding that "they weren't hiding their PDA at all."

Nina Dobrev

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—Reporting by Sara Kitnick and Marc Malkin