Meine neue Lieblingsband ist Kill Hannah.

Nachdem horte ich dern Song "Race the Dream" von "Kill Hannah" auf Pandora gehört habe, ich liebe ich diese Band jetzt [/mag ich diese Band jetzt sehr].

After I heard the song "Race the Dream" by "Kill Hannah" on Pandora, I love this band now.

Differences between German and English:

- "after" as preposition is "nach", as conjunction it's "nachdem"
- "Nachdem" is a subclause conjunction, so the verb needs to be in last position
- Perfekt (present perfect) in German expresses an action that is finished. Imperfekt (simple past) expresses an action that is unfinished. So you must use Perfekt here.
- The main clause needs the verb in second position, and the subclause counts as one part of the mainclause in first position.
- The expression "ich liebe X" will be understood, but is used in a different way than "I love X".
- If your keyboard doesn't have umlauts, the rules are ä = ae, ö = oe, ü = ue and ß = ss. Don't just omit the two dots.

English and German are similar enough that it's tempting to just substitute words, but German has it's own rules and expressions and at some point you must stop to "think in English" and start "thinking in German".