Is there a way to see tweets that are directed at a certain person?

[Ang]

I thought there was a way to go to someone's twitter account and see all the tweets that people made about them. For example, how can I see all tweets that were directed at Dane Cook? I'm sure people tweet to him all the time, but I can't see those tweets unless he retweets them. Did this used to be an option and now it's gone? Is it a privacy setting? btw, I'm on mobile. THANKS!!

[KrazyKia]

You go the tab that reads "mentions" and it will pick up all the tweets about the person. Or just type their username (@whatever) in the search bar