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The 33-year-old singer took part in the 'challenge' to see whether the unlikely duo is bussin' or disgustin' (her words).
She saw the initial video from @yayayayummy who says the combo is 'so good' and stitched that with her own attempt. At the beginning she sighs from her bed before taking herself to the fridge.
After clicking her fingers to make chopped up watermelon, Lizzo says: "Welcome to 'is it bussin' or is it disgusting'. Just kidding, I just made that up."
She then squirts mustard (Heinz, oi oi) on to a piece of the fruit and adds: "Alright, I've been seeing this s*** on the internet. Mustard, watermelon."
After taking a juicy bite, she looks confused/grossed out before reaching over for the condiment once more. So it seems she kinda likes it enough to be going back for seconds.
Announcing: "I don't understand..." she continues to eat the watermelon laced with mustard before simply making a 'haaaaaah?' noise.
Then the video is over and we're still unsure whether she likes it or not.
One person, who shares our sentiments, wrote: "I don't know if she kept trying it because she was confused by the taste or she was enjoying it."
Another added: "Your face say no, but your words say yes."
Some people asked her to start a 'Is it bussin' or disgustin' w/ Lizzo' feature while others told her to try things like watermelon with cinnamon.
Up to now, the clip has been watched by over 21 million people with more than 4.3 million liking it and 87,000 sharing it.
Another fan said: "I love that she kept trying juuust in case something changed."
Lizzo captioned the post: "ummmm I ended up just eating it w tajin." If you're unaware what Tajin is, it's a mixture of chilli peppers, lime and sea salt.
So maybe she didn't like it after all and was just trying to figure out why it's supposed to be good... will we ever find out?
Maybe we all just need to try it for ourselves which some of Lizzo's followers have done and said it's 'bussin'.
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