The BAFTA TV Awards paid tribute to Caroline Flack during this evening's ceremony, as the BBC looked back on those who have passed away in the last year.
The 40-year-old TV personality took her own life on February 15 in her London home.
Reminded of his longtime friend and colleague after watching the BAFTA tribute, Keith shared a moving video from his friendship with Caroline.
In the video, Keith could be heard calling out to Caroline, saying: "There she is. There she is, sing some words."
Caroline appeared in the shot, smiling and laughing before saying: "Hello!"
In the caption below, Keith said: "So strange seeing Caroline in the montage of people we have lost on the Baftas.
"This year is like a broken time machine where the future is just all wrong. I miss bumping into Flack at events and do’s, and I miss seeing her on here. Here she is x."
Keith and Caroline first worked together on his show Bo' Selecta in the early noughties, as she rose to fame playing the character of Bubbles.
After her death, Keith designed a T-shirt with Caroline's image on the front, which was sold to raise funds for Samaritans and to spread a message of kindness.
Nearing the end of the virtual BAFTA ceremony this evening, presenter Richard Ayoade paused to honour those the TV industry has lost.
He said: "Now its time to pause and reflect on some of the people we have sadly lost in the past 15 months. "
A brief clip of Caroline was shown, presenting a series of ITV2's Love Island as the show's beloved host.
Taking to Twitter, viewers paid tribute to the legendary TV presenter, highlighting her life and legacy on the screen.
One said: "Caroline... I can’t."
"Devastating seeing Caroline Flack on the bafta clips of Love Island. This year has been so heavy," wrote a second.
And a third penned: "I really find it hard to grasp the fact that Caroline Flack needs to be included in this montage. Incredibly sad."
"Every time I see Caroline Flack my stomach drops. I still find it hard to believe she’s no longer with us," a fourth added.