What band did sammi hager sing for before van halen?

No. Sammy Hagar was in Van Halen from 1985 until 1996, then from 2003 until 2004. David Lee Roth is again the lead singer, ever since 2006. (No vocalist from 2004 to 2006). Ed was busy bringing Wolfie up to speed to replace Mike Anthony, which he did in 2005, then toured in 2007, 2008, and 2012.