If we have a piano:

• Breakable

Otherwise

• Valerie -Amy Winehouse
• Bon Iver?
• Teenage Dream -KP
• Twice -Little Dragon
• Maps- Yeah Yeah Yeahs
• Monster -Lady Gaga
• "16 candles..."-Fall Out Boy
• Six feet under the stars
• karma police
• baby one more time

Just for fun later on:

• Heaven-Bryan Adams
• Criminal-Fiona Apple