The tour kicks off with a pair of shows in Brooklyn this October.
"I can't tell you how much this means to me!!!!" the pop star wrote.
"There’s a million other people. Is it really, really important for him to come back? I don’t think so," she said.
In the recently released chart, the number one position went to Hiiragi Magnetite's "Tetoris," followed closely by DECO*27's "Monitoring."
"My life and its challenges finally make sense. So so much sense," she wrote.
The slate of European shows were set to begin June 19 in Copenhagen, Denmark.
The festival that already has two U.S. destinations will expand to Toronto in October.
The initial album, Songbird, will drop this fall.
The musician will play in the U.S. and Europe for his latest run of shows.
Smith also celerated his other kids on Instagram