Elvis is still alive & kicking, he's not singing Viva Las Vegas. In fact he's singing the Blues.
Well not exactly Elvis his estate is suing the Westgate Las Vegas Resort & Casino.

Here is an excerpt from a story written by Mark Savage from BBC News

Westgate Resort and Casino is holding the items "hostage" as part of a dispute with the operators of an Elvis exhibition.
The Graceland Presents Elvis attraction closed abruptly earlier this month.
Billed as the largest exhibition of Elvis memorabilia outside his Graceland home and museum, the attraction opened last April to great fanfare.