Avril Lavigne Engagement Ring 'Worth $350,000'

Avril Lavigne's engagement ring is reportedly worth a cool $350,000.

Following the shock announcement that Lavigne had accepted Nickelback frontman Chad Kroeger's marriage proposal, it has now emerged that the rocker splashed a lot of cash on the ring.

Speaking of the sparkler, jewellery expert Michael O'Connor told US Weekly: "A pear shape diamond set in platinum is a nod to vintage glamour and individuality - perfect for a rocker like Avril.

"The half-moon diamonds are also rare since they would have to be specially cut to fit on either side of the centre diamond. The centre diamond is approximately 10 carats, with an additional four carats of total side diamonds."

The couple have since been spotted celebrating their engagement in Las Vegas, with reports claiming they knocked back bottles of champagne and vodka at the 1OAK nightclub.

An onlooker told Life & Style magazine: "They went to 1 Oak Nightclub in Las Vegas on Aug. 21 to celebrate their engagement.

"Avril arrived first with a bunch of male friends and bodyguards, then Chad showed up later and met them inside. Avril was so excited to see her man.

"They were super cuddly and affectionate. They drank Dom Pérignon and Grey Goose.'She can pound the vodka."

Despite the initial surprise that the 27-year old had become engaged to Kroeger, pals have since told People that they are the perfect match.

The insider said: "They have the same values and really understand each other. They complement each other and are so happy."

Avril and Chad have since spoken of their engagement in an interview with HELLO! Canada, where Kroeger revealed: "I knew I was falling for her. It was incredibly powerful and something I'll never forget."

Lavigne - who was previously married to Sum 41 star Deryck Whibley - added: "He makes me laugh every day. He takes care of me in every way and is extremely attentive."

Miley Cyrus Flashes on First Red Carpet With Liam Hemsworth Post-Engagement

At Wednesday's Australians in Film Breakthrough Awards in Century City, Calif., Miley Cyrus and Liam Hemsworth made their first joint red carpet appearance since announcing their engagement last month.

And 19-year-old Cyrus, naturally, wore yet another eyebrow-raising ensemble: A skintight black mini-dress featuring unmissable cutouts, plus platform shoes, and newly straitened hair.

"It's called Zimmerman," the former Hannah Montana star told reporters. "It's from Australia. I love a little built-in corset, every girl does!"

Cyrus gushed that she was happy to be the supportive wife-to-be that night for honoree Hemsworth, 22. "I just wanted to wear something simple because tonight is all about him . . . "I'm super stoked for him. He's really happy and it's great!"

Although she wouldn't give any details on their future wedding, Cyrus, did explain what drew her to Hemsworth, whom she's been dating on and off for about three years. "I like when men work hard, I think it's important," she explained. "I always work really hard so it's good to have someone who is as passionate about what they do and wants to be great at what they do instead of just being OK. We always strive to have our 130%."

Hemsworth's Australian background doesn't hurt, either. "I think there's a masculinity about [Australian men] that's like growing up in the South, like I did. It's very respectful and they are a little bit more respectful."

Added Hemsworth of their engagement: "We're very, very excited, very happy!"

Robert Pattinson engaged to Kristen Stewart?

Twilight star Robert Pattinson has reportedly proposed his girlfriend Kristen Stewart with an emerald ring. The 26-year-old actor is said to have splashed the cash on a "beautiful emerald ring" for Stewart and the couple are planning to wed later this year, reported 

"It's a beautiful emerald ring. He's a real romantic and loves to take an opportunity to remind her that she's the one. He gave her a ring because he adores her and wants to marry her," a source said.

"They want their wedding to be authentic, with soul. It's important for him that music be a big part of the wedding. He's writing a song for her and plans to perform it on the vintage Fender guitar she bought him for Christmas last year," the source added.

Emma Roberts to Chris Evans: Marry Me!

Emma Roberts stops by Target for a little retail therapy on Wednesday (May 16) in Los Angeles.

The 21-year-old actress left with a shopping cart full of goodies, before she headed to a beauty salon in Beverly Hills.

“Just saw #TheAvengers,” Emma tweeted the day before. “Umm ScarJo you rock my socks and Chris Evans marry me.”

Emma‘s new flick Virginia is currently in theaters!

The movie is about a beautiful yet unhinged single mother (Jennifer Connelly) who struggles to raise her son Emmett (Harrison Gilbertson) while dreaming of escaping her small Southern boardwalk town.