Miley Cyrus must be giving a really convincing performance in the currently filming (if ham-handedly titled) "LOL: Laughing Out Loud." Romantic speculation began in earnest this week after she was snapped shooting some romantic scenes in Paris with easy-on-the-eyes co-star Douglas Booth. Toss in a group outing or two and -- voila! -- dating rumors aplenty. But it looks like the starlet, 18, who may or may not have inked a new tattoo on her pinkie, hasn't made a warp-speed rebound from her recent split with Aussie actor Liam Hemsworth. "She's not dating anyone," an insider tells E! Online. "Miley is single." Booth, however, supposedly has a bit of a crush on her.