Lady Gaga has promised to keep performing until she nears her 60s.
The 39-year-old singer made a pact with fans at London's The O2 to be back on the same stage in 20 years "no matter what".
Lady Gaga has promised to keep performing until she nears her 60s.
The 39-year-old singer made a pact with fans at London's The O2 to be back on the same stage in 20 years "no matter what".