The singer is rumoured to be dating Union J member George Shelley, while a recent article claimed that she is "very close" with District3's Dan Ferrari-Lane.
A show source told The Sun: "Dan has a crush on Ella - but he can't own up to it now she and George are so joined at the hip."
Henderson tweeted: "'Ella and Dan get very close'... REALLY?!!! Why don't we know about this? Hahaaaaa."
replied: "Always the last to know Haha! Thought we were trying to keep it under wraps? LOL ... only messin."
Henderson and Ferrari-Lane went to the same college, with sources saying he hoped they could start a relationship.
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