Beyonce's 'Mirrors': #BeyHereNow Announcement Is A Pepsi Ad (VIDEO)

Beyonce's big #BeyHereNow announcement has been revealed, and it's a Pepsi ad.

"Mirrors" does, however, feature a new song. In the ad, B is seen dancing in front of a mirror, as multiple incarnations of herself appear. There's the Destiny's Child-era Beyonce in a pink "Bootylicious" getup, the "Crazy in Love" Beyonce in a white tank and jean shorts, the "Single Ladies"-style hair and unitard and, of course, the modern B. (Scroll down for a gallery of stills.)

"Embrace your past," she says at the end, "but live for now."

UPDATE: The song that's teased in the ad is called "Grown Woman" and features production from Timbaland. It will be released on April 8. More on that here.

The original article continues below.

In a seconds-long YouTube video posted Wednesday, Beyonce is shown as new music plays in the background. Text then appears and directs users to pay attention at 9 am on Thursday, offering up the hashtag #BeyHereNow as a guiding light.

Pre-announcement speculation had many thinking the singer would unveil information about her album. Rumors of a new single have been percolating for some time, so a song, album title and release date were all plausible.

The choosing of 4/4 as the date to make an announcement is no surprise as Beyonce has repeatedly spoken about her love for the number four, even naming her fourth album, "4." (The "Ivy" in Blue Ivy Carter, Beyonce's daughter's name, channels IV, the Roman numeral for four. Both Beyonce and Jay-Z are born on the fourth day of their respective birth-months.)

"We all have special numbers in our lives, and 4 is that for me," Beyonce said in an interview with Billboard. "It's the day I was born. My mother's birthday, and a lot of my friends' birthdays, are on the fourth; April 4 is my wedding date."

Beyonce's "Mirrors"