Self-PortraitistsMiley Cyurs, Katy Perry & the Week’s Best Celebrity SelfiesAmy Zimmerman11.09.13Self-PortraitistsMiley Cyurs, Katy Perry & the Week’s Best Celebrity SelfiesKaty Perry has crabs, Snoop Dogg and Rihanna celebrate puff puff pass Tuesday, and more of the week’s best selfies.Amy Zimmerman11.09.13 10:45 AM ETDavid Letterman learns how to work his iPhone, Selena Gomez and Demi Lovato are selfie sisters, and Jason Biggs manages some bathroom multitasking. Plus, more selfies celebs tweeted this week. @parishilton/InstagramParis HiltonWhat's even more narcissistic than a selfie? Asking multiple members of your posse to take a selfie for you. Paris Hilton pioneered the trend this week, uploading this mega-posed pre-Ellen Show selfie to Instagram on Thursday. @selenagomez/Instagram Selena Gomez and Demi LovatoCelebrity friendships may be fleeting, but selfies are forever. Selena Gomez and Demi Lovato captured their matching duck faces for posterity on Thursday, uploading this mirror snap along with the caption "It's just the evidence of forever. No matter what." @lateshow/InstagramDavid LettermanDavid Letterman showed off a refreshingly amateur approach to the celeb selfie this week, uploading a blurry, unfiltered pic that may as well have been taken on a flip phone (gasp!). The talk show host, who shot this selfie at an inexplicably unflattering angle, ought to enroll in Paris Hilton's school for glamorous celebrity pseudo-selfies. @iamdiddy/Instagram DiddyMost fathers think quality time consists of throwing the ball around, or maybe going for a late night drive. This selfie should make those dads feel pretty lame. Diddy went all out for "father and son night," snapping this courtside selfie mugging with his blinged-out son. Because while money might not be able to buy a son's love, it can definitely score you awesome seats and a killer selfie. @snoopdogg/Instagram SnoopAccording to Instagram, "#puffpuffpassTuesdays" is Snoop Dogg's favorite weekly holiday. The rapper celebrated in style this week, uploading this heavily decorated pic (yep, that's a red-eyed unicorn in the bottom right corner) of a smoke session with bad gal Riri herself. Looks like Snoop's religious epiphany didn't affect his maturity levels. @katyperry/Instagram Katy PerryKaty Perry certainly loves her props. So it's no surprise that the pop sensation decided to give this selfie a little pizazz by posing with a tiny crab. While the caption ("Sometimes I can get a little crabby.") is a tad unoriginal, we're willing to cut Katy a little slack. After all, she did just release a chart topping album, Prism, and a number one hit, "Roar". @dixiechicks/TwitterNatalie MainesNever one to avoid controversy, Natalie Maines of the Dixie Chicks can be seen cutting her own hair in this behind the scenes selfie. @MileyCyrus/TwitterMiley CyrusYou kiss your grandmother with that mouth? Miley Cyrus, the famously foul-mouthed, hard-partying, former Disney star, isn't all shock and awe. The pop sensation is still a child at heart, snapping this sweet selfie in honor of her Grandmother's birthday. @JennyMcCarthy/TwitterJenny McCarthyJenny McCarthy used precise arm extension to achieve the perfect angle for this flattering shot with Kathy Griffin. Clearly overcome with her selfie skills, McCarthy forgot to spell check, captioning this pic "Lov'n my bitcj". @kalpenn/TwitterKal PennKal Penn took a trip down memory lane this week, channeling lovable pothead Kumar Patel by barraging his Twitter followers with nonsensical, goofy mustache selfies. The hilarious series is a must-see for Harold & Kumar fans and silly celebrity selfie enthusiasts. @TaySchilling/TwitterTaylor SchillingOrange Is the New Black portrays many of the unglamorous indignities of prison life. In this twit pic, Jason Biggs exposes the harsh reality behind filming the Netflix series itself, as the star is forced to multitask by getting his makeup done while on the toilet. @KChenoweth/TwitterKristin ChenowethPixie cuts have been trending hard these past few weeks, with celebs competing to see who can go shortest. Kristin Chenoweth threw her hat into the ring last Friday, tweeting this shorn selfie of her new 'do.