People.com Celebrity Stars' Pajama Party! Demi Lovato's slumber party to Kim Kardashian's hot-pink retainer, see how the stars get ready for zzz's in their Twitter pics! By Cara Lynn Shultz Published on October 8, 2010 06:00 PM Share Tweet Pin Email 01 of 09 KATY PERRY Courtesy Katy Perry The singer celebrated her album Teenage Dream topping the charts with "my new South Park pj's" – and an adult beverage! – on her tour bus. 02 of 09 KIM KARDASHIAN Courtesy Kim Kardashian So that's how she got that famous smile! Tweeted the reality star. 03 of 09 ASHLEE SIMPSON-WENTZ Courtesy Ashlee Simpson Before turning in for the night, the singer offered some sweet nighttime wishes, possibly for hubby Pete Wentz! "Goodnight.. my dear rest your beautiful mind," she Tweeted. 04 of 09 JESSICA ALBA Courtesy Jessica Alba Alba and a pal cuddled in bed during a pajama party across the pond. "Nigh London," Alba Tweeted. 05 of 09 DEMI LOVATO Courtesy Demi Lovato Just call her the pajama MacGyver! During an impromptu sleepover with Camp Rock 2: The Final Jam costar Chloe Bridges, Lovato finagled some . 06 of 09 DEMI & MADISON Courtesy Demi Lovato She's no stranger to slumber parties! Here, Lovato and little sis Madison – who stars on Desperate Housewives – snuggled in bed for a sisterly sleepover. 07 of 09 TORI'S KIDS Courtesy Tori Spelling While Tori Spelling and her hubby Dean McDermott were out of town, Spelling left Liam and Stella with their "guncles" Scout Masterson and Bill Horn (not pictured), for a super sleepover (just check out Liam's jammies!). Spelling Tweeted. 08 of 09 JORDIN SPARKS Courtesy Jordin Sparks boasted Sparks. Looks like Sparks – and her furry pal – both find the blanket with sleeves quite comfy! 09 of 09 JULIANNE HOUGH Courtesy Julianne Hough Who's that masked woman? "Girls gone wild! Avacado [sic] and ayesha masks," Tweeted Hough, indulging in a little spa goodness with pals on her tour bus.