10/12/2011 01:00 pm ET | Updated Dec 12, 2011

Joan Rivers To Christina Aguilera: 'You Look Like A Pig'

Shocking new photos of Christina Aguilera performing at the Michael Jackson tribute concert last weekend have fans wondering if the sexy singer is okay. But when I showed Joan Rivers the new images, she had no problem slamming Aguilera for looking like she put on a few pounds.

"You look like a pig," Rivers said of Aguilera on the set of "New York Live." "She's not just eating apples!"

But it wasn't just Aguilera that caught the comedian's eye, Rivers also had plenty to say about Jessica Simpson -- who was also recently spotted looking a bit larger -- and the parents on "Toddlers & Tiaras."

"They say Jessica is pregnant or maybe she's having a good time," Rivers joked. "On 'Toddlers & Tiaras' every mother wobbles into the room. We all need to walk."

This isn't the first time Rivers has spoken out about Aguilera. Back in February, after the singer famously flubbed the lyrics to the National Anthem at the Super Bowl, Rivers told me, "How stupid can you get? Christina must have been thinking about food -- that's why she forgot the words."

When it comes to Rivers' wrath, it look like Aguilera just can't catch a break.

Joan is currently filming her second season of "Joan & Melissa: Joan Knows Best?"


Aguilera takes the cake for most questionable on-stage ensemble, but check out these other superstars who got it right in concert:

Stars In Concert