Lohan continues to keep Babs Walters waiting; this time she's picked Dave Letterman

Apparently the timing still is not right. Lindsay Lohan, who famously stood up Barbara Walters to give an interview instead with NBC's "Tonight Show' host Jay Leno last fall, while promoting her Elizabeth Taylor biopic, will stand up Babs again and visit David Letterman on Tuesday, to promote her upcoming guest starring role in the FX comedy series "Anger Management" -- starring Charlie Sheen, who famously got sacked off his previous comedy series on Dave's network, CBS.