Now that Jennifer Aniston is officially off the market, she's left some big shoes to fill.

Ever since her divorce to Brad Pitt in 2005, Jennifer has been wearing the crown of America's "sad single girl." But now that she and Justin Thereoux are getting ready to walk down the aisle, we're left to figure out who will be the next single sweetheart of America. Here's a look at Hollywire's top 5 picks for the position!

1. Sandra Bullock

Related Article: 9 Reasons We Love Sandra Bullock

Okay, so Sandra is already kind of America's Sweetheart at this point. But after being cheated on by ex-husband Jesse James with a bunch of tatted-up floozies, we can't really think of a celebrity more people would want to see find love again.

2. Demi Moore

See above. Demi was very unceremoniously dumped by Ashton Kutcher after being cheated on and she now has to watch him run around with a significantly younger woman in Mila Kunis. And her rehab stint afterwards for anorexia and substance abuse shows that she didn't take it very well. She's back making movies now, but we'd love to see her truly cement her moving forward post-divorce by finding someone better!

3. Demi Lovato

What can't Demi Lovato overcome? She's overcome anorexia and drug abuse to become an A-list singer and judge on X Factor. And she's weathered devastating public breakups to Joe Jonas and notorious womanizer/d-bag Wilmer Valderramma. It's pretty hard not to get behind Demi with her fighting spirit.

4. Jennifer Love Hewitt

How is Jennifer so perpetually single?! She's talented, successful and hot. She's also endured a number of high-profile breakups to Ross McCall, Jamie Kennedy and Carson Daly. She's too cute to not have America rooting for her in her quest for love.

5. Selena Gomez

Let's be honest. Selena really, really needs her relationship with Justin Bieber to work out. Think of how done-zo Nick Cannon's career would be if Mariah Carey dumped him. Then multiply that by ten. That would be what would happen if Biebs ever broke up with Selena.

Who is your pick for America's next single sweetheart?

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