Hmm I don't really have a confidence playlist per say, but there are songs I frequently listen to when I go running to help motivate me...
"I Like It"
"In My Head"
"TiK ToK"
"Faded" by soulDecision
"DJ Got Us Fallin In Love"
"Pain" by Jimmy Eat World
"Blue Monday" by Orgy
"Save Me" by Unwritten Law
"Its America" by Rodney Atkins
"All That I've Got" by The Used
"Kickstarts" by Example
"The Bad Touch" by Bloodhound Gang
"Famous Last Words" by My Chemical Romance
"Break Your Heart" by Taio Cruz
"Good Girls Go Bad" by Cobra Starship
"99 Problems" by Jay-Z
"She Wants To Move" by N.E.R.D.
"Read My Mind" by The Killers
"Rock That Body" by Black Eyed Peas
"Smooth Criminal" by Alien Ant Farm
"Black Or White" by Michael Jackson
I really don't discriminate against any genre of music (though I do favor electropop), as long as its upbeat.