Beyonce and Rihanna attend the Gucci and RocNation Pre-GRAMMY brunch held at Soho House on February 12, 2011 in West Hollywood, California.

*Rihanna nearly cancelled a concert in Ireland on Friday due to “stress,” according to The Sun newspaper.

The singer reportedly broke down shortly before the show in Dublin – which was the latest stop on her 100+ date Loud Tour – and was only talked out of scrapping the show altogether by a phone call to fellow singer Beyonce.

A source told The Sun newspaper: “She’s just a young woman who just wants to have fun, but she was feeling pretty low. It’s a mix of exhaustion and stress. She’s been partying hard to take her mind off things, but there are days when she wakes up and doesn’t even know where she is because of the traveling. It’s no wonder she is feeling down.”

Regarding Beyonce’s mentoring, the source added: “She knows Rihanna needs downtime or she’ll burn out.”

After her performance on Friday, Rihanna wrote online: “I’m so light-headed!”

On Thursday night, she hosted a lavish Thanksgiving feast in Ireland for her tour staff and entourage, ordering food from a top French restaurant and celebrating in a private room of O’Donoghue’s bar.

Rihanna had to cancel two shows in Sweden a month ago, as she was hospitalized with “the flu.” She was also thought to have been warned by doctors to curb her partying lifestyle.

She has 16 dates left on her Loud Tour, which concludes on Dec. 22 in London.