The singer made an emotional tweet a day after a hologram that looked like the king of pop performed the new hit of his posthumous album 'Xscape' at the Billboard Music Awards recently, reported Contactmusic.
"My brother, Michael, was, is and always will be a genius. I love you, Mike. Janet," she tweeted.
It was earlier rumoured Janet was set to join the hologram version of her brother on stage for the performance of the song but she was not able to make it.
Michael died in 2009 following drug overdose.