"We get IVs every now and again. A lot of water." Related: The Boys Are Back! Big Time Rush Release First Single in 8 Years ...

Big Time Rush is going on their own tour soon ... since the group got together to record "Better Place" -- their hit single ...

Larry Busacca/Getty Images for Nickelodeon It may have been a boy band fan's dream come true that One Direction and Big Time Rush once teamed up for a tour, but it wasn't so easy for BTR at the time.