Adam Golstein and Nicole RichieAdam Goldstein and Nicole RichieThey're on, they're off...they're on again.

We can't keep up with the love lives of some of these celebs.

While people like Susan Sarandon and Tim Robbins just stay together forever, there are other stars who can't decide if their on-off partner is the great love of their life or not.

Like Liz Burton and Richard Taylor these are the stars who marry and re-marry the same person.

Think Nicole Richie and former fiance Adam Goldstein, Nicollette Sheridan and Michael Bolton or even Eminem and Kim Mathers.

Click through our gallery to see which hot 'n' cold couples are on right now.