The Head And The Heart's new single "Rhythm & Blues" (Warner Bros.) was this week's Most Added song at Modern Rock. Other winners included Kaleo's "All The Pretty Girls" (Elektra), Spoon's "Hot Thoughts" (Matador), Glass Animals' "Pork Soda" (Harvest) and Bastille's "Blame" (Capitol). One record to watch is Missio's "Middle Fingers" (Triple 8), which was added today at KROQ, WRFF and KITS among others.