Is 18 about to replace 13 as Taylor Swift’s favorite number? Today, Swift posted a video on Instagram with the words, “So, here’s your first clue…”

The video shows a finger, perhaps Swift’s, pushing the number 18 in an elevator, patiently at first and then more adamantly.

Swift has been working on a new album for the last year so it’s likely a reference to her newest set. She has been remarkably reliable in terms of dropping new albums every two years in the fourth quarter. Her self-titled debut came out in October 2006, “Fearless” in November 2008; “Speak Now” in October 2010, and “Red” in October 2012.

Chances are we'll hear new music  live by Swift when she performs at MTV's Video Music Awards on Aug. 24. E News! reports that her performance will be "explosive," and that she is appearing alone, not as part of a collaboration.

And for sure she'll be singing new material when she appears at the iHeartRadio Music Festival, which takes place in Las Vegas Sept. 19-20. iHeartRadio DJ Kristin Cruz promised as much when she posted a photo with Swift and tweeted a few weeks ago that the singer would debut "new songs" at the event.

Melinda Newman is the former West Coast Bureau Chief for Billboard Magazine with more than 15 years of music industry experience. She also covers entertainment for The Los Angeles Times, The Washington Post, Variety, MSN, AOL and other outlets.