Katy Perry's "Part of Me" rounds out the top 10, holding at No. 10 for a second week. It's the first time that it hasn't fallen since it debuted at No. 1 four weeks ago. "Part" breaks into the Radio Songs top 10 (11-6; 74 million, up 13%) and elevates 41-34 on On-Demand Songs (260,000, up 31%). The song drops 7-10 on Digital Songs (114,000, down 8%) but could yet rebound on the Hot 100; it opened atop the Hot 100 due to strong initial sales but strong airplay gains are now offsetting its sales erosion. Next week's release of Perry's "Teenage Dream: the Complete Confection" should additionally enhance the song's profile and future chart potential
its like a history.. but i love it 