Hollywood's friendliest exes

Jennie Garth and Peter Facinelli are very friendly exes. The pair took their kids on vacation together -- along with their new significant others. Pictured here (left to right) are Lily Anne Harrison, Lola Ray Facinelli, Peter Facinelli, Fiona Eve Facinelli, Jennie Garth and Dave Abrams at the Dreams Playa Mujeres Golf & Spa Resort in Mexico.  (Victor Garcia )

There's staying friends with your ex, and then there's kissing them on the lips. Jennifer Lopez planted one on her ex-husband Marc Anthony after she presented him with an award at the 17th Annual Latin Grammy Awards. (Reuters)

Hilary Duff and her ex-husband Mike Comrie still spend a lot of family time together. The parents of son Luca often are seen hanging out together and going on family vacations. Duff <a href="http://www.foxnews.com/entertainment/2016/11/09/hilary-duff-talks-divorce-dont-feel-need-to-get-married-again.html" target="_blank">said of their divorce</a>, "We got together based on love and we separated in a very loving way." Click here for more pics of the pair on <a href="http://www.X17online.com" target="_blank">X17online.com</a>. (X17)

Jen and Ben have been spotted together many times since their split. The parents of three have stated that they remain friendly and are working together to co-parent. "We're good friends and we're doing our best, and our kids are fabulous and we're working our best for them," Affleck told Ellen Degeneres. Click here for more pics on <a href="http://www.x17online.com/">X17online.com</a>. (X17)

Seems like Kate Hudson is okay being a third wheel to her ex Matthew Bellamy and his current girlfriend. The former pair vacationed with their son and Bellamy's girl together. Talk about a modern family! <a href="http://www.etonline.com/news/192876_kate_hudson_reunites_with_ex_matt_bellamy_snuggles_with_son_bingham_on_his_5th_birthday/" target="_blank">More: Kate Hudson reunites with ex Matt Bellamy on son's birthday</a> (AKM-GSI)

The former pair took their kids out together on Halloween in 2016. Click here for more pics of Mariah on <a href="http://www.Hollywoodlife.com" target="_blank">Hollywoodlife.com</a>. (Instagram)

Kate Beckinsale (left) and Michael Sheen (right) called in quits after 8 years in 2003. The former flames share a daughter and have learned to get along. Beckinsale is even tight with Sheen's girlfriend, comedian Sarah Silverman. (Reuters)