Former Disney star, Selena Gomez, has caused quite a stir online when she was recently photographed while having a casual stroll in New York, showing major cleavage. She was wearing jeans and a tank top sans bra underneath, sparking a boob implant debate. 

The 22-year-old fueled speculation that she might have gone under the knife to look a bit curvier. Reports say the singer-actress has broken up... again with on/off boyfriend Justin Bieber.

Several plastic surgeons exclusively told Hollywood Life that based from their observations, it is likely that Selena had breast augmentation. Here are some of their insights.

Dr. Jonathan Shifren of WAVE Plastic Surgery Center in L.A.: "It appears that Selena has had a breast augmentation. The breasts appear fuller and you can see the outline of the upper portion of the implant. They tend to sit high on the chest wall in the immediate post-operative period. My imprint from the picture is that she had the operation fairly recently." 

Dr. Steve Fallek of New York: "Right breast is a dead giveaway [to a boob job]. Way too full and shapely on the top which can only happen with an implant. Also because she is not wearing a bra you can see where the nipple areola complex is in relationship to the rest of her breast."

However, TMZ says, after careful debate and consideration, Selena's "assets" appear to be real.

"...sources extremely close to SG's tank top tell us the assets are original issue ... and not enhanced in any way, shape or insanely good form. Upon much closer inspection of the entire set of pics (we love our jobs) -- Selena's chest was merely bouncing while she walked. The camera just caught her chest on an upstroke."

"This is a rumor that comes up all the time," added a source to E! Online. "She did not have any work done."

Sexier Appearance For Justin Bieber

Selena Gomez and Justin Bieber have been rumored to have gotten back together but recent posts by Bieber, 20, show him spending a lot of cozy time with model Yovanna Ventura.

Loads of photos have been uploaded on Justin's Shots and Instagram page. One photo in particular shows Ventura hugging the "Baby" singer from the back with her hands under his shirt.

The "Come & Get It" singer has been suffering from low self-esteem issues because Justin's become notorious for spending a lot of time with different women, reports say.

HollywoodLife.com reported that "Selena was once looking into getting a boob job in order to be sexier for Justin, because she was afraid of losing him." The site added that Selena has been pouring over all the women that Justin has been with, comparing herself and needing to compete with them. She reportedly wanted to be the hottest woman so she can keep the attention and affections of Justin. Regardless of how beautiful she is, Gomez apparently, only sees her flaws.

So what do you think? Did Selena really go under the knife?