AceShowbiz - Even though Paris Hilton has to keep away her engagement ring after briefly losing it earlier this year, she has always been sporting a replica of the sparkler wherever and whenever she goes. However, now that she has allegedly called things off with Chris Zylka, it looks like she doesn't have to show off the ring to public anymore.

Fueling speculation of their breakup, the hotel heiress was spotted arriving at the airport in Melbourne, Australia on Thursday, November 22 without her massive engagement ring. She looked totally fine, flashing a big smile for the paparazzi as she made her way through the airport and even took the time to chat with them like nothing happened.

When asked about the missing engagement ring by TMZ, Paris simply smiled without saying anything. "I'm working, I'm busy," the blonde beauty replied when reporters kept asking about the matter.

Her engagement ring aside, Paris did look gorgeous despite opting for a casual look that day. Getting chic and comfortable in a long-sleeved black shirt and matching wide pants, the "Stars Are Blind" hitmaker accessorized the look with a black baseball cap and oversized sunglasses. Completing her look were a pair of black Nike sneakers.

Paris and Chris were first reported to call off their engagement earlier this week, with a source alleging that the pair "have been having issues for over six months" leading up to the split. The former reportedly was "having cold feet and didn't know if she was ready to marry him." According to the source, Paris "knew he was not her forever guy and could not go through the whole process while having these feelings."

Following the news, the socialite-turned-DJ took to Instagram to seemingly address the report by quoting a line from Marilyn Monroe which might hint at troubles in their relationship.