if you mean which other artist featured in Lady Gaga's 'telephone', then the answer is beyonce Knowles
lady gaga and beyonce lady gaga also wrote -just dance -bad romance -telephone -and mabye some others that escape me at the moment, :)))
She sang "Telephone", and "Alejandro"
Lady Gaga herself.
The song Telephone is by Lady Gaga, and features Beyonce.
Lady Gaga sings Telephone with Beyoncé, but it's mostly Gaga singing.
Lady gaga
Lady Gaga.
lady gaga
Lady Gaga
Lady Gaga sang in bars and clubs.
it is slovenian actor and model..jure bradac:
Flo Rida was fetured in the song 'Starstruck' with Lady gaga.