Valentine's Day is tomorrow, and we're celebrating with a look back at some of the hottest celebrity PDA pictures. From sweet kisses and romantic embraces to vacation cuddling and red-carpet cuteness, there are plenty of ways stars show their love. Click through to see Diane Kruger and Joshua Jackson, Rachel McAdams and Michael Sheen, Tom Cruise and Katie Holmes, Brad Pitt and Angelina Jolie, and Read more

Celebrities had another exciting weekend enjoying time outside and with their families! Jessica Alba visited a park in LA with her daughters while Marion Cotillard strolled through chilly NYC with baby Marcel. Katherine Heigl grabbed lunch with her loves, and Rebecca Gayheart spent the day with Billie Dane — click through to see what they were all up to! Read more

The couple that plays together, stays together, and the same seems to be true for these celebrity duos who work out together. Keeping fit is a high priority in Hollywood, and these celebrities definitely know how to go from significant other to workout buddy. Take a look at these couples that love to sweat as a pair, whether it's at the gym, on the hills, or on the road! Sources: INFDaily.com and Read more

Despite the sad news of Whitney Houston passing, this year's Grammy show was still a splashy night for music's biggest stars. The awards celebrated a variety of artists, and we've got a ton of great pictures of the evening's highlights, from the arrivals, acceptances, and performances, and everything in between. Check them out to see all the fashion and other big moments of the night. Read more

The week kicked off with an exciting Super Bowl and wrapped up with Fashion Week celebrations! Beyoncé Knowles surprised fans with her first post-baby appearance in NYC while Kate Middleton stepped out solo in London. Gisele Bundchen consoled Tom Brady following his devastating loss and Jennifer Lopez worked on her tan in Malibu. All that and more happened, so click through to see the hot Read more

Jennifer Aniston turns 43 years old today! She celebrated her birthday with a trip to Mexico in 2010, but last year she ditched the two-piece for dinner in NYC with friends. We haven't seen her hit the beach lately, since she's been busy traveling between LA and NYC with new boyfriend Justin Theroux. The duo connected back in 2010 while working on Wanderlust, which hits theaters later this month. Read more

Scarlett Johansson broke out her bikini and hit the beach in Hawaii Friday with boyfriend Nate Naylor. The couple relaxed under the sun, and Nate even rubbed suntan lotion onto Scarlett's back. The tropical getaway comes on the heels of Scarlett's recent trip to Berlin and an appearance at Obama's "Runway to Win" fundraiser in NYC earlier this week. Nate and Scarlett went public with their Read more

Stars all over the globe were busy this week, but NYC saw a lot of action. In the city that never sleeps, Maggie Gyllenhaal and Ewan McGregor were on set to shoot The Corrections, Marion Cotillard and Joaquin Phoenix worked on a new project, and the set of Gossip Girl saw two big kisses! Click on through to check out what other actors were hard at work. Read more

Relationships come and go in Hollywood, and while some stars are just beginning a new love affair others have stood the test of time with their significant other. Jessica Simpson and Eric Johnson are adding to their family this year while Robert Pattinson and Kristen Stewart are taking things slow. Johnny Depp and Vanessa Paradis have been together over a decade and new couple Emma Stone and Read more

Celebrities shared photos on Twitter of their fun this week, whether in Indianapolis for fun Super Bowl festivities, on set, or even on the highway. Jessica Simpson took her baby bump to the big game, Nina Dobrev and Snoop Dogg partied with DirecTV, and Reese Witherspoon went for a drive with Chelsea Handler. Click through to see this week's best pics and don't forget to follow PopSugar on Read more