In that third tweet, Gaga is referring to her trouble with Russian authorities in 2012. Russian Prime Minister Dmitry Medvedev spoke out against the law and allowed her concert to go on as planned.
Thank You Prime Minister Medvedev for not standing by your party's anti gay propaganda law & instead supporting my show+fans all over Russia
— Lady Gaga (@ladygaga) December 7, 2012
Prime Minister Medvedev please accept my gratitude I am looking forward to performing in RUSSIA & celebrating our cultures coming together
— Lady Gaga (@ladygaga) December 7, 2012