Question: Who sang the singles "State of Grace" and "Begin Again"?

<P0-S0> "Begin Again" is a song written and recorded by American singer-songwriter Taylor Swift for her fourth studio album, "Red" (2012). <P0-S1>  Swift co-produced the song with Nathan Chapman and Dann Huff. <P0-S2>  Initially released as a promotional single on September 25, 2012 by Big Machine Records, the song served as the second single from "Red" on October 1, 2012. <P0-S3>  "Begin Again" is a country song, with the lyrical content finds Swift falling in love again after a failed relationship. <SEP> <P1-S0> Graceful 4 is The Grace's first Japanese album, released on November 14, 2007. <P1-S1>  The title track, "One More Time, OK?" <P1-S2> , is a translated version of the song "한번 더, OK? " <P1-S3>  from "Chun Sang Ji Hee's The Grace" (Tenjochiki) first Korean album. <P1-S4>  Tenjochiki's first Japanese studio album includes the 5 singles released from 2006 January in Japan, and the album has a total of 14 tracks. <P1-S5>  The album sold a total of 1,622 copies in Japan, peaking at No. 103 in the Oricon charts. <SEP> <P2-S0> "State of Grace" is a song by American singer-songwriter Taylor Swift from her fourth studio album "Red" (2012). <P2-S1>  It was released to the iTunes Store on October 16, 2012, in the United States by Big Machine Records as the fourth and final promotional single from the album. <P2-S2>  It was the only promotional single from the album that was not re-issued as an official single, as "Begin Again", "Red", and "I Knew You Were Trouble", were all later re-issued as official singles. <P2-S3>  The song was written by Swift and produced by Nathan Chapman and Swift. <P2-S4>  Musically, the song is a departure from Swift's typical country pop, using influences of alternative rock while being compared to bands such as U2, Muse and The Cranberries. <P2-S5>  The song has received immense praise from music critics, who have complimented its broader sound in comparison with Swift's previous material. <SEP> <P3-S0> Riccardo Massi is an Italian operatic tenor who had performed at such Italian theatres as both the Giuseppe Verdi Theatre and La Scala. <P3-S1>  He became known for his role as Mario Cavaradossi in "Tosca" which he performed in autumn of 2011 at the Bavarian State Opera and then performed again at the Berlin Opera Theatre in November of that year. <P3-S2>  His US debut was in February 2012 as Radames in "Aida" at the Metropolitan Opera following by another summer performance that year. <P3-S3>  In the autumn of 2012 he sang in "Il trovatore" staged by the Canadian Opera in Toronto and in February 2013 sang Calaf in "Turandot" produced by the Royal Swedish Opera. <P3-S4>  He also became known for his performance as Don Alvaro in "La forza del destino" at the Australian Opera and the same year sang in another "Aida" production, this time at the Michigan Opera Theatre. <P3-S5>  From 2013 to 2014 he performed at the Royal Opera House and as Cavaradossi at the Liceu in Barcelona. <P3-S6>  Later on, he returned to Royal Swedish Opera where he sang the title role in "Andrea Chenier" and then another "Radames" at the Houston Grand Opera. <P3-S7>  At the Opernhaus Zurich, he sang Calaf in December 2015.