Watch: Kelly Rowland, Michelle Williams reunite to serenade toddler

WASHINGTON, Sept. 16 (UPI) -- Destiny's Child alumnas Michelle Williams and Kelly Rowland took some time out of their playtime with the latter star's son, Titan, to sing him a new song.

Rowland posted a video onto her Instagram page Tuesday featuring the two harmoniously serenading the soon-to-be 1-year-old. The singer encouraged her followers to expand on the tune, which starts off with "Hi Titan/Hi baby/I love you babe."

During the clip, little Titan Jewell Witherspoon noticeably enjoys the song while laughing and staring straight at his mother throughout while in Williams' lap.

"Ok your turn, add a third, post the video and make sure you hashtag #TITANSsong #GO!" Rowland wrote in the post's caption.

Titan was born in November of last year to Rowland and her husband, Tim Witherspoon. The couple married earlier that May in Costa Rica during a wedding attended by Beyonce and her sister Solange.