From New York Fashion Week to the return of fall TV -- the celebuverse has been buzzin'! Which means that Hollywood types like Alessandra Ambrosio and Justin Bieber have been keeping us up-to-date on their every move via Twitter and Instagram. Click through to see why Christina Aguilera wants to chat with you, plus more celeb TwitPics.
"Big week ahead! #TheVoice premiere week starts Monday & on Wednesday I'm doing a live twitter Q&A with YOU! #YourBody" --Christina Aguilera, who looks more tawdry than pop starry while promoting her live Twitter Q&A