WATCH: Jennifer Aniston, Selena Gomez share a heartwarming embrace; singer deems it best interview of her life

We are seriously struggling to believe Jennifer Aniston is 51! The A-lister celebrated the milestone on Feb. 11 with some of her closest pals at the Sunset Tower Hotel in West Hollywood.

Jennifer Aniston celebrated her 51st birthday yesterday—and for the first time, she was on Instagram to respond to the many tributes posted to her. There was a party too, of course: Several celebrities, including Chace Crawford, Elisabeth Moss, Jennifer Meyer, and Aniston's Friends co-star Courteney Cox, showed up at the Sunset Tower Hotel to fête the actress.

Party animals! Jennifer Aniston celebrated her 51st birthday at Sunset Tower Hotel in Los Angeles on Tuesday, February 11, with a star-studded bash including her Friends costar Courteney Cox and jewelry designer Jennifer Meyer.

A true friend! Jennifer Aniston is one of the most beloved figures in Hollywood — and even her fellow stars are on the Team Jen bandwagon.

Both Brad Pitt and Jennifer Aniston attended the same Oscars after-party. Pitt was celebrating his Best Supporting Actor Academy Award win for his role as Cliff Booth in Once Upon a Time … in Hollywood.

Oscar winner Brad Pitt had another run-in with Jennifer Aniston last night, at a party after the ceremony. The two met up at Guy Oseary's Oscar after party, Page Six reports.

Jennifer Aniston came out for the Oscar after parties, and she came dressed to turn heads. The Morning Show actress and Screen Actors Guild winner arrived at Netflix's Oscar after party with her Friends co-star Courteney Cox, wearing a short black dress. It's simple but simultaneously one of her sexiest looks from all of awards season.

Jennifer Aniston and her ex-boyfriend John Mayer were spotted at the same restaurant, and reportedly left just seconds apart from each other. This may be a coincidence, but the two have said some intriguing things about each other since the breakup.

Sara Foster's 39th birthday dinner was the place to be for top female Hollywood stars.

Jennifer Aniston and Brad Pitt exploded all of our hearts when they reunited at the SAG Awards and had the exact same chemistry as when they were married lovebirds. Turns out they have something else in common—they've been recently styled by the same two people. (Yes, I know I'm being corny about all this. Yes, I love them so much. No, I won't apologize.)

In January 2014, Selena Gomez was in Park City, Utah, to promote her role in Rudderless at the Sundance Film Festival. At the time, she was looking for the next step in her career, after growing up as an actress on a series of Disney shows and releasing four albums on Hollywood Records.

© Getty Cast member Selena Gomez poses at the premiere for the film "Dolittle" in Los Angeles, California, U.S., January 11, 2020. REUTERS/Mario Anzuoni Selena Gomez relived the moment she was left starstruck and speechless following a restroom meeting with Jennifer Aniston.

Selena Gomez gave what she called on Instagram "one of my favorite interviews of my life! [To] the queen herself!" on the Ellen DeGeneres Show yesterday when Jennifer Aniston guest-hosted. Gomez spent a bit of time gushing about Friends and her obsession with Rachel Green, and then the two broke down their first meeting...in a bathroom.

Selena Gomez relived the moment she was left starstruck and speechless following a restroom meeting with Jennifer Aniston.

Brad Pitt tells Entertainment Tonight that he is "blissfully naive" of the media circus surrounding his award season run-ins with his ex-wife, actress Jennifer Aniston. Pitt has poked fun at his personal life during multiple acceptance speeches during recent award ceremonies, including even at one point joking he had a Tinder account.

Jennifer Aniston, 50, is the guest host of The Ellen DeGeneres Show on Jan. 24 and she welcomes longtime friend Selena Gomez, 27, to the show. Selena can’t believe that she’s sitting down with the Rachel Green. Selena gushes over the very first time she met Jennifer, which was in a bathroom at a party. Selena remembers that Jennifer was in the bathroom wearing a black dress, of course, and that’s when they first crossed paths.

So no one told Selena Gomez life was gonna be this way! On Friday (Jan. 24), the pop star stopped by The Ellen DeGeneres Show to fangirl over guest host Jennifer Aniston.After the Friends star promised not to scare her the way Ellen DeGeneres usually does on the show, Gomez gushed over how much she loved the long-running sitcom that made Aniston a household name."First off, are you guys kidding me? Rachel was my life!" she exclaimed as the audience cheered.

Remember the one with the rumor? Well, Jennifer Aniston is still living it.