It's certainly not the first time we've wondered, pondered and contemplated Iggy Azalea's derriere and it probably won't be the last! But our new pix of Iggy at Malibu's Mastro's Steakhouse over the weekend have us questioning, yet again, whether the Australian singer has undergone some sort of plastic surgery on her backside ...

After the sexy chanteuse posted numerous sexy selfies and belfies recently, during a vacay in Mexico, fans got to wondering if -- and accusing -- Iggy about the possibility she's had butt implants. She all but denied the question when asked on MTV's Wild 'N Out not long ago but did anyone ask her about butt INJECTIONS?

We think her junk looks really similar, albeit slightly smaller, than Kim Kardashian's. And Iggy's copped to having her nose and her boobs done, so maybe she got a 3-for-1 deal from her doctor and did a bit of booty enhancement as well??? Sorry, Iggy -- it just looks too good to be true!