Horror fans and music festival fans, listen up! The clock is ticking on your chance to win a trip for two to Las Vegas to attend the Rock in Rio Music Festival — featuring headlining acts Taylor Swift and Bruno Mars — the weekend of May 15. Not only will you score tickets to the "World's Biggest Music Festival," you'll also score a two-night stay at the legit haunted Rocking Chair House. Legend has it the ghost of Rita McGill still occupies the inn — and she doesn't take kindly to guests. Party all day, paranormal all night!

If you've got the guts to make it through the weekend, you need to enter NOW. All you have to do is check out the trailer above for Insidious: Chapter 3, the latest installment in the seriously terrifying horror series, and then show us how you'd react if you encountered such an insidious entity. Upload your reaction to Twitter, Instagram or Vine using hashtag #InsidiousScareDare, or paste the URL to your reaction (plus unlock additional entries) in the entry form here. [Official Rules]

More opportunities to enter for a chance to win tickets to two more festivals happening later this summer, with equally haunted housing, are on the way. In fact, we got Vine star Lele Pons stay overnight in one of our prized spooky locations — and we got the whole shocking experience on video — so keep your eyes here for details.

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