Michelle Williams has a ''spiritual bond'' with Beyonce and Kelly Rowland.

The Destiny's Child bandmates recently reunited to record 'Say Yes', a song for Michelle's fourth studio album, and even though the 'Survivor' group - who briefly reformed onstage at the Super Bowl half-time show in 2013 - have been disbanded for nearly a decade, they remain close as ever.

Michelle gushed to PEOPLE: ''We're honoured to be there for each other in our happy moments. I've never really had genuine female relationships until I met them. I don't care what anyone says, we miss each other.

''We have that spiritual bond with each other where we know when you're really tired, you need your sister with you today, or you just need a phone call to let them know you're thinking about them. I call them my soulmates.''

The 33-year-old singer also revealed that filming the music video for 'Say Yes' brought back many memories as it reminded her of when she first met Beyonce and Kelly, who hired her to replace axed Destiny's Child members LaTavia Roberson and Letoya Luckett in 1999.

She said: ''I can't believe it's been 15 years [since we've met]. That's why I was so happy when they did my album and Beyoncé had her braids! It took me back when I first met her and she had those blonde braids. I was like, 'Oh my God, you're taking me back to 'Say My Name'!''

Meanwhile, Michelle has denounced claims she isn't as successful as her fellow 'Lose My Breath' hitmakers, insisting she has worked non-stop for 15 years.

The gospel songstress feels her work goes ''under the radar'' compared to worldwide superstar Beyonce, 32, and Kelly, 33, who has had notable stints as a reality TV judge.

She fired back: ''A lot of things I do go under the radar, so people do feel that I'm not as successful as the other ones, but I've made Broadway history and my fourth album is coming out. I've been working 15 years straight. I haven't stopped.''