Complex sentence: A demo of "Tik Tik Boom" performed by G.R.L. was speculated to be a demo of the Spears song; this was later revealed to be true when the album was released.
Split into simpler sentences: A demo of "Tik Tik Boom" performed by G.R.L. was speculated to be a demo of the Spears song. This was later revealed to be true when the album was released.