Complex sentence: During 2004, their songs "Lunes" and "KLSP" gained popularity, with "Jeepney" following in early 2005 along with their version of "Crazy For You".
Split into simpler sentences: During 2004, their songs "Lunes" and "KLSP" gained popularity. Also, "Jeepney" became popular in the beginning of 2005 along with their own version of "Crazy For You".