Celebrity engagement rings continue to fascinate fans by the sheer size and cost of these tokens of love. But who's worn the most expensive?

From Gwen Stefani's $500,000 sparkler to Mariah Carey's 35-carat emerald-cut diamond, here are the most expensive celebrity engagement rings ever.

The unusual (and huge!) ring he did it with. Eva Longoria Instagram Judging from the Instagram, this is no traditional halo-set giant Hollywood diamond. Instead, Baston appeared to have selected ...

Neither Princess Diana or Meghan Markle own the the most expensive royal engagement ring. Someone outside the House of ...

When Turner got down on one knee he presented his fiancée with a gorgeous Neil Lane ring that ... Blindsided' Turner chose a princess cut diamond ring accented with two baguette cut diamonds ...

In her latest photos, Tara was seen wearing a large, stunning diamond ring. One of the pictures showed the actress striking a pose with the ring, while another offered a close-up view of the ...