The relationship between Selena Gomez and Justin Bieber has been anything but smooth these past couple of years.

On Monday, the 21-year-old pop princess took to her Instagram account and posted a couple of photos, including a photo of a text message, which led fans to believe that it was from her ex boyfriend, Justin Bieber.

Gomez, began by posting a video of her playing the piano, which she captioned "I don't know. I'm on my way you know."

Then shortly after that, she posted a photo of a text message from an anonymous sender which read "I just wanna give you a hug and remind you how special you are."

The caption you ask? "That's who you wanna wake up to #promise."

Many of her fans began wondering whether that message was from Bieber himself. According to E Online , Gomez is still in love with Bieber. "It's hard for her to get over him, because they have so much history. You can't just drop those feelings. There is too much there."

But, it looks like Justin has moved on sooner than expected.

Bieber took to his Shots account to post a very cuddly photo with model Yvonne Ventura. In the photo, Ventura has her arms wrapped around Bieber while he works casually on his music.

But that's not it. After a couple of other shots of them together with friends, a second photo was posted. As usual, Ventura again wrapped her arms around Bieber and on captioned the photo, "Sweetest guy ever @justinbieber," on her account.

Just yesterday, Hollywood Life reported that Bieber and Ventura went out for a fast food date at Chik-Fil-A, and although it was a casual date, Bieber took out Ventura in a luxurious leopard print Audi R8.

Despite all these mixed signals, E Online states that Bieber is however scheduled to attend Gomez's 22 birthday party. E Online also shared that many of Gomez's close friends are not pleased with this approval. "No one wants [Bieber] to go. All her friends want him out of the picture and just want her to have a relaxing birthday with no trouble and they think he's going to dominate her attention. She doesn't seem to care that he spends time with other women and isn't always honest with her. She's hypnotized. Her friends just want her to enjoy herself for her birthday, but if Justin attends it might complicate matters."

By the looks of it, it looks like Justin and Selena's relationship is definitely one roller coaster ride.

images via Instagram: Justin Bieber , Selena Gomez
other images via Shots: Justin Bieber