Self-Portraitists Rihanna, Selena Gomez & More Celebrity Twitter Picture (PHOTOS)Victoria Kezra07.07.13Self-Portraitists Rihanna, Selena Gomez & More Celebrity Twitter Picture (PHOTOS)RiRi tweets from Paris Fashion Week, Gisele Bündchen does ‘mommy and me,’ Michelle Obama in Africa, plus more of the best shots tweeted by the stars this week.Victoria Kezra07.07.13 6:18 PM ETvia InstagramRi Ri tweets from Paris Fashion Week, Gisele Bündchen does Mommy and Me, Michelle Obama in Africa, plus more of the best shots tweeted by the stars this week. via InstagramJessica AlbaWho knew Jessica Alba was part of the Bey hive? She looked excited with friends while taking this quick picture before seeing Beyoncé on her Mrs. Carter tour. Maybe this was in celebration of her recent ’80s-inspired cover of Glamour France? via InstagramGisele BündchenEven models can be maternal. The normally glamorous Gisele Bündchen gave her followers a look at her other side with this tweet—comfy clothes and her family playing with trains on the floor during a sunny Sunday morning. via TwitterCharlie Sheen Charlie Sheen shared this cute family portrait of himself, his boys, and some fierce sharks. The Anger Management star appeared to be having fun, spending quality time with twins Bob and Max. Recently, the boys have been placed in the care of Sheen’s other ex, Denise Richards, after their mother, Brooke Mueller, entered rehab. via InstagramKarina SmirnoffBest known as one of the professionals on Dancing With the Stars, dancer Karina Smirnoff couldn’t resist getting a sweet treat from an unusual ice cream truck. Smirnoff is in New York getting ready to perform with the show Forever Tango on Broadway, along with ex-boyfriend Maksim Chmerkovskiy. via TwitterSelena Gomez Selena Gomez looks composed in the picture she posted from her performance at the 103.3 AMP Radio Birthday Bash in Boston. But it wasn’t without a few hiccups: Gomez fell victim to a wardrobe malfunction on stage, yet seemed to take it all in stride. “What an amazing crowd!” she tweeted. via InstagramRihanna Rihanna was in the City of Light this week, along with many other famous faces, to attend Paris Fashion Week. It’s a good guess to say she’s a fan of Chanel, judging from her bright smile and Chanel bag while posing with designer Karl Lagerfeld after Chanel’s show. It seems that not even the Barbados beauty can put a grin on Lagerfeld’s face, but Rihanna was thrilled, posting, “The man himself @karllagerfeld #PaRih #fashionheaven.” via InstagramMariah Carey This shot was taken backstage at the BET Awards, with Mariah Carey and hubby Nick Cannon. Carey’s performance lead to speculation about whether she’d lip-synced her song “Beautiful,” but it seems the rumors didn’t get her down. She looks thrilled in her glittering gown. via InstagramBrooke Hogan Brooke Hogan has had quite the week. Seen here with comedian Louie Anderson, the singer and reality star also recently got engaged to Dallas Cowboys center Phil Costa in Las Vegas. Dating the daughter of a professional wrestler will certainly keep Costa on his toes. via InstagramSelita Ebanks Beautiful on the inside and out. Model Selita Ebanks tweeted this shot of her visit with children promoting the Valerie Fund, a nonprofit that assists children with cancer and blood disorders. Her caption: “How cute are they!!! Mia-3, Mathew-5 and Sameed-6. #myhero's.” via InstagramSoulja Boy Soulja Boy off in this. It looks like the rapper has quite an impressive and expensive car in this image, along with nice shoes, a nice watch, and what looks like an iPhone on his wrist. It must pay well to be Soulja Boy. Hopefully he solved his debt woes before purchasing all of those new toys. via InstagramKate Upton For once, Kate Upton might not be the curviest bombshell in a photo. Upton was celebrating the recent Defense of Marriage Act takedown at Gay Pride in New York with fashion and transgender icon Amanda Lepore. Upton will be featured in the September issue of Elle. via InstagramMichelle ObamaThe first lady sat down with former first lady Laura Bush at the African First Ladies Summit in Tanzania this week. Obama took over for her social-media team during the president’s Africa trip and posted pics on Twitter and her new Instagram account. Next week she’ll be hosting a special state dinner with kid chefs from around the country to showcase healthy recipes.