Oh, baby Luca. Hilary Duff's little boy has been a TwitPic favorite over the last year, and we can't thank his Auntie Haylie enough for posting this gem to celebrate his first birthday. Happy Birthday, big guy!

Nicole Scherzinger's pooch is clearly fed up with her hair and makeup ritual, while Kelly Osbourne triumphantly returns to E! after her scary seizure two weeks ago. Glad to see she's ok!

Plus, Mariah Carey hangs out with Dem Babies after "American Idol," Rosie O'Donnell's baby girl is already practicing her ballet skills, and Khloe Kardashian's pup is pooped.

Click above to see the pics these celebs and more shared the week!

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