Kathy Griffin has claimed her "former friend" Dave Grohl ignored her during a chance encounter at New York's John F. Kennedy Airport following her controversial Donald Trump photoshoot. On the latest episode of her Talk Your Head Off YouTube series, Kathy recalled: "I ran into him at JFK. "Then Dave acted like he didn’t know me. However, Kathy did not approach him because she feared it may be awkward if Dave was ignoring her because of the Trump-head photoshoot. The entertainer said: "Then I thought maybe I should go up to him.