Mariah Beyonce

Pop singer Beyonce stopped backstage to visit with songbird Mariah Carey at her NYC concert on December 11.

Carey posted this photo on Instagram.com along with the caption: “I love you @beyonce thank you sooooo much for coming out tonight!”

Some of Carey’s followers noted how much younger the 46-year-old singer looked than Beyonce, who is a decade younger than Carey.

“Beyonce looks like Mimi’s mother!” noted one sharp-eyed Instagram.com user.

Anti-aging doctors say taking a daily regimen of vitamin C, vitamin E and Selenium will help prevent the formation of “free radicals” that prematurely age skin cells.

In related news, Carey took to Twitter.com on Monday to announce she will tour with the legendary Lionel Richie in 2017. Tickets go on sale at 4 pm today.