Some of the most popular tweets on Twitter simply disappeared Tuesday.
Tweets that have disappeared from the site include Ellen Degeneres' Oscars tweet that was retweeted more than 3 million times and the late actor Cory Monteith's final tweet.
Twitter is not sure why the tweets were deleted but is investigating the issue.
We are currently researching a bug that has caused some Tweets to not be displayed. http://t.co/19sKkq6wk4— Twitter Support (@Support) March 25, 2014