The e-ring is officially back on!

Looking every inch the seventies sweetheart in a floppy felt hat, black bellbottoms and a furry vest -- plus Christian Louboutin heels and an Alexander Wang bag -- Kristin Cavallari flashed her 5.2 carat engagement ring as she treated herself to a shopping trip in Malibu, on Sunday.

The Dancing with the Stars alum has had a very emotional year after calling off her engagement with NFL star Jay Cutler, before getting back together late last month.

Now the former Hills star is throwing herself back into the wedding planning full-force, but don't expect the Chicago Bears player to pitch in with any of the wedding plans!

Cutler confessed on ESPN's Waddle & Silvy radio show: "I don't really make a lot of (wedding) decisions. I hear about them in passing, or if I have to possibly write a check or something like that, but other than that, whatever she wants to do, I'm on board."