OK! Wake Up Call: Justin Bieber's Sweet Tweet, Selena Gomez Sports a New 'Do, and More!

Rise and shine, pop culture fans! Rub your eyes, get to stretchin', and pour yourself a hot cup of coffee because it's time to start your day off right with a little OK! Wake Up Call. It's better than the blaring ring from your alarm clock, right? 

Here are some things to know today:

Welcome Melissa Joan Hart and Joey Lawrence back into your living room. A new season of Melissa & Joey premieres tonight! (ABC)

It's Mel B's 37th birthday. Click here to wish her a good one with a tweet—or just sing your fave Spice Girls song. (Twitter)

The CFDA presenters list is out. Kerry Washington and Jessica Chastain, as well as other stylish notables, made the list. (WWD)

Adam Levine and Leonardo DiCaprio seem to love the runway, or maybe they just love the beautiful ladies that walk across it. There's talk that both of these hotties have new model girlfriends. (MSN)

Justin Bieber sends Nathan Sykes a sweet tweet. (Perez Hilton)

Khloe Kardashian is going to be an auntie again! The celeb is excited to meet Kim's little one. (Celebuzz)  

Here's the latest on the chronicles of celebrity hairdos. Anne Hathaway went back to brunette, but Selena Gomez has her eyes on a lighter style. The singer and gf to the Biebs went a little blonder than usual. (People Style Watch)

Get up to date on the latest father/son acting duo—Will and Jaden Smith. Their movie premieres today! (Vulture)