Selena Gomez, Justin Bieber, Cody Simpson, & Snooki Lead This Weeks TwitPics [PHOTOS]

Celebs have been taking to Twitter to show us what they have been up to in the first week of 2012. Selena Gomez snapped a picture of boyfriend Justin Bieber, while Rihanna hung out with her BFF, and Mario Lopez went back to work and spent some time with the girls from “Jersey Shore.” Check out the rest of the photos below to see what some of your other favorite celebs have been up to in the new year!

This smile is because of Carly Rae Jepsen.. We have not stopped listening your song girl!instagr.am/p/d-oXk/

— Selena Gomez (@selenagomez) January 3, 2012

Loving Las Vegas! twitpic.com/82hm6o

— Cody Simpson (@CodySimpson) January 3, 2012

My pillow-so awesomelockerz.com/s/170966138

— NiC0LE P0LiZZi (@snooki) January 4, 2012

With the guidettes of Jersey Shore! @snooki, @jenniwoww, @mtvsammi, @deenanicolemtv #thankyouladies yfrog.com/obf66xaj

— Mario Lopez (@MarioLopezExtra) January 4, 2012

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Party like rockstars @joannakruppa @martgakruppainstagr.am/p/edgyL/

— Paris Hilton (@ParisHilton) January 3, 2012

#goldcoastsfinestinstagr.am/p/eBrip/

— ian somerhalder (@iansomerhalder) January 2, 2012

Photo: GUESS WHO… tmblr.co/ZCGbQwECLdAN

— ke$ha(@keshasuxx) January 3, 2012

With the guidettes of Jersey Shore! @snooki, @jenniwoww, @mtvsammi, @deenanicolemtv #thankyouladies yfrog.com/obf66xaj

— Diana Madison (@DianaMadison) January 4, 2012

I fractured my neck doing tumbling & acrobatics 4 tour! Always tryin 2 push boundaries 4 YOU! Like my new chain? fb.me/131rt0qU2

— Jason Derulo (@jasonderulo) January 4, 2012

Me+M my#bfff lockerz.com/s/170610491

— Rihanna (@rihanna) January 1, 2012