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LeAnn Rimes is all smiles while chatting with Jay Leno during her appearance on The Tonight Show with Jay Leno on Tuesday (December 18) in Burbank, Calif.

After her chat, the 30-year-old singer wowed the audience with a performance on the show.

PHOTOS: Check out the latest pics of LeAnn Rimes

After the show, LeAnn tweeted, “Leno was fantastic and I was and am SO sick. Thank you GOD for pulling me through and talking w/ jay was was always fun!!!”

It was recently announced that LeAnn will sing a duet with Carly Rose Sonenclar on the season finale of X Factor.

“LeAnn Rimes is singing with me and I’m very excited about that,” Carly shared. “I think she is amazing and her voice is really, really special. I’m psyched.”

Megan Fox keeps it chic while chatting with Jay Leno during her appearance on The Tonight Show with Jay Leno on Monday (December 17) in Burbank, Calif.

Later in the show, the 26-year-old actress was seen holding up a mini jersey of Heisman trophy winner Johnny Manziel, who was also on the show.

PHOTOS: Check out the latest pics of Megan Fox

Johnny posted two pictures of himself with Megan on his Instagram and said, “Not a bad night with Megan Fox on the Tonight’s Show!” Check out the cute pictures below!

“I love it,” Megan shared about motherhood. “It’s my favorite thing that I’ve ever done so far, so I’m happy with it.”

FYI: Megan is wearing a Roland Mouret dress and Christian Louboutin shoes.

Ewan McGregor suits up while making an appearance on The Tonight Show with Jay Leno on Tuesday (December 11) in Burbank, Calif.

The next day, the 41-year-old actor’s The Impossible co-star Naomi Watts made an appearance on Late Night With Jimmy Fallon at Rockefeller Center in New York City.

“They were really incredible,” Ewan told Jay about their film. “There’s always a responsibility when you’re playing someone who exists and in this case I was working with a really lovely man, Henry, who I like very much. It’s a terrible tragedy the tsunami in 2004. We did our best.”

Click inside to watch the rest of Ewan‘s interview, and to check out more pics… More Here! »

Krysten Ritter is all smiles while making an appearance on The Tonight Show with Jay Leno on Thursday (December 6) in Burbank, Calif.

The 30-year-old actress talked to Jay about her upcoming birthday and promoted her show Don’t Trust the B—- in Apartment 23.

PHOTOS: Check out the latest pics of Krysten Ritter

“Catch me promoting Don’t Trust the B—- @apt23 tonight on @jayleno!,” Krysten wrote on her Twitter account. “Wearing Monique Lhuiller! Styled by @ilariaurbinati make up by @amynadine.”

FYI: Krysten is wearing a Monique Lhuillier dress.

Click inside to watch the rest of Krysten‘s interview… More Here! »

Joseph Gordon-Levitt chats with Jay Leno during an appearance on The Tonight Show on Wednesday (November 21) in Burbank, Calif.

The 31-year-old Lincoln actor talked about his hosting gig on Saturday Night Live back in September when he did a Magic Mike striptease during the opening monologue.

WATCH: Joseph Gordon-Levitt strips it off in Magic Mike dance routine!

Jay asked whether his pal Channing Tatum reached out to him about the appearance.

“He emailed me while it was on. In fact, he emailed me twice. His first email was like ‘You’re killing it!’ and then the second email was ‘Humping the floor=amazing,’” Joseph said.

Click inside to watch Joseph Gordon-Levitt talk about his new film Lincoln… More Here! »

Lindsay Lohan keeps it elegant while attending the premiere of her new movie Liz & Dick held at the Beverly Hills Hotel on Tuesday (November 20) in Beverly Hills, Calif.

Earlier in the night, the 26-year-old actress talked about why she cancelled her recent 20/20 interview with Barbara Walters during her appearance on The Tonight Show with Jay Leno.

PHOTOS: Check out the latest pics of Lindsay Lohan

“It’s just, the timing wasn’t right, right now. I love her, and I’m a big fan of Barbara Walters. I met her when I was very young, and when it’s right, she knows she’ll be the first person I sit down with,” Lindsay shared.

FYI: Lindsay is wearing a Donna Dashini gown, Nanzo Muzi shoes, and Vintage jewels at the premiere. Lindsay wore a Dion Lee dress, Christian Louboutin Shoes, and Cartier earrings at her appearance on The Tonight Show with Jay Leno.

20+ pictures of Lindsay Lohan attending a premiere of Liz & Dick…

Keira Knightley is gorgeous in green while making an appearance on The Tonight Show with Jay Leno on Tuesday (November 13) in Burbank, Calif.

The 27-year-old actress, in a Burberry dress, promoted her new film Anna Karenina, which will hit theaters in limited release this weekend.

PHOTOS: Check out the latest pics of Keira Knightley

In case you missed it, check out a topless Keira on the cover of Allure‘s latest issue.

“The anorexic stuff–all of that–it’s always going to have an impact, so I think it did hit pretty hard,” Keira told the mag about anorexia rumors.

FYI: Keira is wearing a Burberry dress and Valentino shoes.