"She likes those rocker types," the source says of Tisdale, 27. "They have mutual friends and just met through hanging out." The new couple stepped out publicly for the first time Dec. 26 when they visited the Apple Store in L.A.
After splitting with Step Up Revolution director Speer in December 2011, Tisdale briefly dated Boys Like Girls musician Martin Johnson. The romance quickly fizzled and the Scary Movie 5 actress reconciled with Speer, 30, in May 2012.
"Ashley and Scott split for the same reason they did last time," a source tells Us of their hush-hush breakup. "Their relationship just ran its course."