Task: Question Answering
Input (English): Passage: Soon after composing "Halo", Tedder worked with Kelly Clarkson on her fourth studio album, All I Ever Wanted (2009), for which they wrote "Already Gone" together. When the song came out, critics noted a resemblance to Beyoncé's "Halo". Clarkson, however, initially stated that she was unaware of any similarities between the two songs. She eventually realized their resemblance when she listened to both recordings closely; the similarities are most notable in the backing tracks, which in both cases feature a melancholy piano, loud drums, and handclaps. Clarkson tried to prevent "Already Gone" from being included on All I Ever Wanted, but it was impossible to make last minute changes, as her album was already being printed when I Am... Sasha Fierce was released. She accused Tedder of using the same arrangement on both "Already Gone" and "Halo", and complained that people would, incorrectly, assume she was stealing it from Beyoncé.Clarkson was furious, and confronted Tedder on the phone. In response, Tedder commented that he would never give two artists the same musical arrangement, and that her criticism was "hurtful and absurd". He asserted that the concept, melodies, and lyrics of "Already Gone" and "Halo" are completely different. Calling "Already Gone" one of the best songs he had ever composed, Tedder challenged people to "listen [to the two ballads] and form their own opinions". Clarkson also tried to stop her label, RCA, from releasing "Already Gone" as a single because she respected Beyoncé, but they went against her will and released it. She said, "It's one of those things I have no control over. I already made my album. At this point, the record company can do whatever they want with it." Clarkson later told James Montgomery of MTV News that it was unfortunate "Already Gone" and "Halo" sound so similar, but noted that at least they have different vocal melodies. 
Question: What are the exact names of the two songs whose similarities Clarkson initially stated she was unaware of?
Output (English): Halo.