The Victoria's Secret model showed off the extra bling as she arrived at LAX, reported Daily Mirror.
Wearing a skintight jeans and a casual white t-shirt, the 27-year-old blonde beauty did not try to hide her hand as she held on to a huge handbag and strolled past cameras.
The pair, who live together in Los Angeles, have been dating since 2010, and previously sparked rumours as they were planning to wed in February this year.
The pair split last September for a short period.