
Actress Julia Louis-Dreyfus takes a selfie with comedian Jerry Seinfeld backstage at David Letterman's final show on Wednesday, May 20. The two former "Seinfeld" stars were among the celebrities who delivered the show's last "Top 10" list.

Film director Bryan Singer, left, takes a selfie with two of his "X-Men: Apocalypse" stars, Nicholas Hoult and Jennifer Lawrence, on Thursday, May 21. Hoult and Lawrence dated for several years before breaking up last year.

Pop star Lady Gaga undergoes some beauty treatment on Thursday, May 21. "(Eight hours) yesterday and still going," she said on Instagram. "Oh the glamours of sleep deprivation."

Actor Dwayne Johnson snaps a photo with a fan in London at the premiere of his new film "San Andreas" on Thursday, May 21. Johnson set a new Guinness World Record by taking 105 selfies in three minutes.

The world's top-ranked tennis player, Novak Djokovic, takes a photo with fans in Paris after a French Open training session on Saturday, May 23.

"This is my first selfie and it's for an amazing cause!" actress Eva Mendes said on Instagram on Wednesday, May 20. "Thank you all so much for helping support Andrew Wilson and his family. Please, please donate - any bit helps! I'm going to sign this tshirt and give it away to one person who makes a donation within the next 48 hours." Mendes also posted some photos of Andrew, a young child she said is undergoing cancer treatment.

Actress Sarah Michelle Gellar, right, takes a selfie with Alyson Hannigan, her former "Buffy the Vampire Slayer" co-star, on Saturday, May 23. "So this girl (#AlysonHannigan) and her husband (#AlexisDenisof) know how to throw a party," Gellar said on Instagram. "I thought I was good with the crafts, till I went to this party #CraftMaster."

Actress Samira Wiley posted this selfie on Wednesday, May 20. Her caption: "That time bathroom selfies were already established as the corniest, and the whole world caught me slipping because I put it on Instagram anyway."

Singer Sheryl Crow holds the phone with Billy Puckett, a Habitat for Humanity "house leader," as hundreds of volunteers worked to build houses in New Orleans on Thursday, May 21.

Rapper Snoop Dogg is flying back to Los Angeles in this selfie he posted to Instagram on Tuesday, May 26. He said it came after an eight-day, nonstop album release push. "Thanks to my team n my family for holding me down," he wrote.

A costumed character takes a selfie with a spectator after a design competition in Beijing on Sunday, May 24.

Chelsea striker Didier Drogba takes a selfie with the Premier League Trophy after a soccer match in London on Sunday, May 24.

Comedian Jimmy Dunn posted this selfie on Wednesday, May 20. "Jimmy travel tip - Try to eat at places with the word 'eat' on the sign," he said on Instagram.

"True or False: the scene we just shot with @kateupton & @williamhmacy included a gunfight, cell phone, and a fart," actor Kal Penn, left, said on Instagram on Wednesday, May 20.

Young women in Kazan, Russia, take a selfie Friday, May 22, as they celebrate the end of classes before final exams.

Actor Patrick Stewart wears a pearl earring in Amsterdam, Netherlands, on Wednesday, May 20 -- a nod, perhaps, to the famous Dutch painting "Girl with a Pearl Earring."

Pro football player Chad Johnson posted this selfie to Instagram with a light-bulb emoji on Thursday, May 21.

"Happy #RedNoseDay!!" said actress Anne Hathaway on Thursday, May 21. "Brought to you from backstage at 'Grounded.' " Many celebrities wore red clown noses to raise money for charity.

YouTube personality Tyler Oakley took this selfie on Thursday, May 21, before appearing on "The Ellen DeGeneres Show."

Song Yun-ah takes a selfie Saturday, May 23, with some of the 1,600 paper pandas created by French artist Paulo Grangeon in Seoul, South Korea. Grangeon has also taken paper pandas to other cities across the globe to raise awareness of how many real pandas are alive in the wild today.

Soccer player Rafinha takes a selfie with his Bayern Munich teammates as they celebrate their German league title in Munich on Sunday, May 24.

Singer Pixie Lott snaps a selfie as she arrives for a screening at the Cannes Film Festival on Thursday, May 21.

Television personality Brody Jenner, in the hat, posted this selfie with comedian Kevin Hart, bottom, and deejay Will "J. Dubb" Smith on Tuesday, May 26. "Such good times this weekend at #taobeach with two of the most down to earth people I know," Jenner wrote on Instagram.

Singer Cassadee Pope performs Sunday, May 24, at the Bayou Country Superfest in Baton Rouge, Louisiana.

A woman takes a selfie with a gun-shaped phone case as she attends the Monaco Grand Prix on Sunday, May 24.

Activist and drag queen artist Panti Bliss, right, takes a selfie with a supporter on Saturday, May 23, as thousands gathered in Dublin, Ireland, to await the outcome of a referendum on same-sex marriage. Voters in Ireland overwhelmingly chose to change their nation's constitution, becoming the first country in the world to legalize same-sex marriage through popular vote. See 28 selfies from last week


