- Publish Date
- Monday, 7 December 2015, 4:19PM
Lady Gaga is 31 years old today!
To celebrate let's take a look back at when she paid homage to Frank Sinatra at the 'Sinatra 100' in Las Vegas in 2015.
Lady Gaga looked barely recognisable in her androgynous ensemble as she took to the stage in a top hat to belt out some of his most famous hits.