Robert Pattinson vs. Jared Leto, Katy Perry Coachella hook-up RUMORS: 'Dark Horse' beauty 'gives in' to sexual tension with Kristen Stewart's ex AND rocker?

If these hook-up rumors are true, Katy Perry's one lucky girl!

Apparently, John Mayer's ex has a crush on Robert Pattinson AND Jared Leto. And both Hollywood heartthrobs allegedly succumbed to the "Dark Horse" beauty's temptations at Coachella.

The flirtation between Perry and Pattinson first began when the "Twilight" heartthrob broke-up with on-and-off again girlfriend, Kristen Stewart. They've been BFFs for years, but earlier this month things got a little more affectionate between the two...

An alleged insider for Life & Style reveals that they finally shared an "intimate" kiss at the Coachella Music & Arts Festival on April 12. 

"He planted it on her... At one point, they held hands. He was like a puppy dog around her."

Another source explains, "There is so much sexual tension between them... Something was bound to eventually happen."

After the steamy lip-lock, one eyewitness overheard Perry whisper, "You know this won't work." But apparently R-Patz still hopes that he might stand a chance. A friend close to the "Life" star said - "Rob adores her and his family loves her. He knows he really has his work cut out for him - it's going to take a lot of wooing for her to see him as more than just a friend."

So, how does Jared Leto fit into all of this?

Perry rumoredly hooked-up with him around the same time!

Yet another source tells OK! magazine, "They both spent time at Coachella, and he's trying to arrange a date, or at least a chance to hang with her alone."

The two were first introduced through mutual friends, and there was an instant connection. The "Dallas Buyers Club" actor is totally Perry's type, because she "has a thing for shaggy music guys, and his eyes melt her." 

Leto's band 30 Seconds to Mars will rumoredly tour with the "Fireworks" pop sensation this summer, "but Jared hopes to take her o a date before they head their separate ways."

Wow - Perry's really playing the field! Do Mstars fans believe all of the hook-up rumors?