Between getting gussied up for the red carpet and bundling up against the polar vortex, celebrities on both coasts were sharing their sweet, silly snaps on social media. Gwen Stefani  was glowing in an adorable baby bump picture, while Lena Dunham got a personalized clutch to rival Anna Gunn's Breaking Bad bag , and Jessica Alba  celebrated the second anniversary of her Honest Company with a cute cake. Jessica and Ashlee Simpson  got together to ring in their mom Tina's birthday, while fellow famous sisters Hilary and Haylie Duff shared a sweet selfie while cooking. Both Debra Messing  and Vanessa Hudgens  had fangirl reactions to meeting Meryl Streep  this week, while Nicky Hilton  got up close and personal with lemurs during a trip to Miami. Also: try not to crack up at Drake's spot-on Lil Wayne costume on the set of SNL, and good luck telling Lady Gaga  and Donatella Versace apart.
Scroll through to see the rest of this week's cutest celebrity candids, and be sure to follow POPSUGAR on Instagram , Facebook , and Twitter !
Lena Dunham got a special gift from designer Charlotte Olympia, which will likely rival this clutch  on the red carpet.
Vanessa Hudgens  (understandably) freaked out a bit once she realized she was doing The Ellen DeGeneres Show on the same day as Meryl Streep .
Behati Prinsloo and Lily Aldridge had a moment together in Miami.
Heidi Klum  celebrated the upcoming season of Germany's Next Topmodel.
Karlie Kloss shared a photo near the Eiffel Tower while in Paris for Haute Couture Week.
Chrissy Teigen suffered a fall while dancing her butt off at Michelle Obama's 50th birthday party — kind of a cool way to get a bruise, though.
Miranda Kerr  lounged in her trailer while on set.
Jaime King shared this adorable snap of her son, James, before his bath time.
Bar Refaeli  showed off gorgeous blooms and some even more gorgeous baubles.
Sofia Vergara made the foolish mistake of falling asleep on the Modern Family set, and her costars Eric Stonestreet, Ty Burrell, and Julie Bowen had some fun at her expense.
Jessica Alba  celebrated the second anniversary of her Honest Company.
Lea Michele  shared a photo with her Glee costars Jenna Ushkowitz and Heather Morris while shooting the show's 100th episode.
Jessica and Ashlee Simpson  got together to celebrate their mom Tina's birthday.
Drake posted a photo of his spot-on Lil Wayne costume backstage at SNL.
Upon getting a visit from Meryl Streep , Debra Messing  shared this photo with the caption, "MERYL F*CKING STREEP in my dressing room!! #dead #cantspeak."
Nicky Hilton  cuddled with a bunch of lemurs at Jungle Island in Miami.
Taylor Swift  and Jaime King had a girls' night in with a box of Armani chocolates.
Lady Gaga  and Donatella Versace were pretty much identical during a dinner after the designer's couture runway show.
Gisele Bündchen was bundled up while working in snowy Boston.
Cara Delevingne and Tyra Banks  got silly while backstage at a Celine Dion concert, of all places.
Gwen Stefani  shared a photo of her baby bump, saying, "bump it #allblack #inappropriateshoes #capturethemoment #miracle."
Sisters Hilary and Haylie Duff took this adorable snap while filming a video for Haylie's Real Girls Kitchen blog.
Alessandra Ambrosio shared a photo while working out.
Kaley Cuoco was feeling sick ahead of the SAG Awards, so her glam squad played it cool and wore face masks.