It's a sisterhood that's tough to break.
Destiny's Child may not officially be together at the moment but that doesn't mean these girls aren't collaborating.
Williams, who's hard at work on a new solo album, told CBS News it's a "strong possibility" that Beyonce and Rowland will appear on her upcoming set, due out this year.
Having tackled gospel, R&B and pop in her career, Williams says her upcoming release -- the follow-up to 2008's "Unexpected" -- will feature a mixture of sounds.
"Because I've done all those genres, I kind of mixed of them together into a big pot of gumbo" she said. "I'm calling it urban inspiration because sonically it's an urban, and the message is of inspiration and hope."
Williams contributed to a lot of the songwriting, but says she has no problem admitting there were moments where she needed help. That's when the 33-year-old singer decided to call upon "some amazing writers." Throughout the process, Williams worked with producer Harmony Samuels (Ariana Grande, Kelly Rowland and Maroon 5). "He's very versatile. He's a real musician. He plays multiple instruments. So you'll get to hear live bass and drums," she said.
Williams has decided to call the album "Journey to Freedom" because "Don't you want to be free from what's keeping you from being the best?" That could mean anything, she says, from overcoming fear to battling depression.
"For me, it's being free from people as far as opinions," she said. "You can get insecure sometimes in this industry or just in life period. And I think some of the most successful people don't worry about it."
That's part of her motivation to become a new advocate for a program called Play On Playbook. A partnership with Playtex, the initiative celebrates confident women who laugh off life's curve balls and those oh-so- embarrassing moments. As an ambassador for the cause, Williams is sharing her own embarrassing moments (and encouraging others to do so via Facebook) as a way to empower women to overcome their own stumbles with some grace.
Williams, herself, had to that during what she considers one of her most embarrassing moments of all time: falling onstage while performing "Soldier" live on BET's "106 & Park" with Destiny's Child.
"I had no choice but to get up and act like it didn't happen," she said. "Because of YouTube -- 10 years later, at least once a week, somebody brings it to my attention." But with the campaign, Williams is glad she's able to "address it and turn it into something good."
Plus, it doesn't hurt to have some good friends by her side. The gals from Destiny's Child remain close to this day.
"We get emails from each other like, 'Man, I miss my sister.' Or 'When are you coming back to L.A.?' Or I'm in New York. I know Bey is back.' We always make sure to go out to dinner, to go to each other's homes and hang out and chill and just be normal. I was so happy because we all spent New Year's together. We were all in Miami for like a week. When I'm in L.A., I'll stay over at Kelly's. So, nothing's changed. We've just gotten a little older and more fabulous."
But as for going back to Destiny's Child full-time, Williams says it's something they don't really talk about.
One thing Williams does love to talk about, though, is theater. She made her Broadway debut in 2003 in "Aida" and has starred in "The Color Purple," "Chicago," "What My Husband Doesn't Know" and "Fela!"
"Theater is the love of my life. I am going to be doing theater very very soon," said Williams, who will next be seen in a traveling arena tour of "Jesus Christ Superstar" with JC Chasez. "I always get an itch...It's just one of the most organic ways that I get to express myself without looking too crazy."