- In late 2005, The Veronicas supported American musician Ryan Cabrera on a tour through the U.S. along with The Click Five.
- In June 2006 The Veronicas were an opening act (along with Ashley Parker Angel) for the Ashlee Simpson U.S. summer tour, but after the first few shows Lisa and Jess had to pull out after Lisa became ill with throat nodules and needed surgery.
- The Veronicas supported Natasha Bedingfield on her 20 date U.S. tour that started on 21 May 2008 in Myrtle Beach and ended on 10 July in San Francisco, Kate Voegele was also a supporting artist on the tour.
- The Veronicas supported American pop-rock band the Jonas Brothers for the last leg of their Burning Up Tour.
- The Veronicas supported Hanson along with Everybody Else on Hanson's 2008 Walk Around the World Tour.