All the Easter eggs for Taylor Swift's new album 'Lover': Are Katy Perry and Selena Gomez on it?

With less than three weeks until "Lover" drops on Aug. 23, fans are clamoring to examine the Easter eggs Taylor Swift may or may not have dropped, giving them a clue at what to expect.

Swift is an evil genius and often posts little hints and clues for fans to dissect.

Exhibit A is a post from Monday that has a series of charm bracelets with words on them like Lover, Fearless, Proud, Cat and Benji.

Now, fans are posting on what they think it could mean.

In 2008, Swift dropped her second album "Fearless," so this could be a hint at her going back to her roots in some way, though the songs she's released thus far don't have that country feel like early Swift.

But her good friend, Selena Gomez, also has this on her Instagram bio as she talks on her faith: "With him on my side I’m FEARLESS, afraid of no one and nothing."

Does this mean a possible collaboration? Fans think so. Swift loves her classic double meanings.

In fact, a fan who attended an album listening party says another famed singer may be on a track with Gomez and Swift -- Katy Perry.

"According to a fan who was invited and attended to #LoverSecretSessions, there will be a Taylor Swift, Selena Gomez and Katy Perry collab. The song is all about women empowerment," a fan site posted earlier this week.

Another clue from this image might point to just that. The word "cat," which obviously refers to Swift's love for felines, but also could refer to the KatyCats, die-hard fans of Perry.

Other clues fans have posted, some whom attended this super secret listening party, are that Swift's favorite song EVER will be in "Lover."

A new song might be coming out later this week.

Who else will cameo?

In the video for "You Need to Calm Down," Hayley Kiyoko is seen shooting an arrow into a No. 5 bull's-eye.

One theory is that Hayley Kiyoko, who has performed with Swift before, will appear on the fifth "Lover" track.

Another track name drop?

Also in that music video, Ellen DeGeneres is getting inked by Adam Lambert with the phrase, "Cruel Summer." Could that be the name of one of Swift's new singles?

Whether these turn out to be correct or not, one thing is for sure - Swift loves her fans.

We promise to update this list as soon as more secrets are teased or revealed!

ABC News' Lesley Messer contributed to this report.