Forgive the X link but it does seem that the Beyoncé rumor was started by Dems, including some connected to the WH.
Can't say for sure that it was to get more eyeballs on Kamala's speech and ultimately drive Trump further over the edge by juicing her ratings but I hope it was.
I want them to get how our attention economy works and be just a little ruthless in their efforts to kick Trump's ass and save our democracy. Stakes are too high for niceties.