7), mixing (track 7) Chris McMillan – hair Ian Mereness – engineering (track 14), programming (track 14) Alan Merrill – songwriting (track 17) Richard Meyer – Pro Tools engineering (track 15), programming (track 15) Jason Mlodzinski – engineering assistance (track 14) Maxayn Moriguchi – backing vocals (track 17) Jackie Murphy – art direction Terius Nash – songwriting (track 5) Kendall Nesbitt – keyboards (track 14) Thabiso "Tab" Nkhereanye – songwriting (track 5) Gary O'Brien – guitar (track 5) Esbjörn Öhrwall – acoustic guitar (track 11), guitar (tracks 4, 9, 13, 16 and 18) Jeanette Olsson – backing vocals (tracks 18 and 19) Paul Oliveira – vocal engineering assistance (track 15) Jonas Östman – engineering assistance (tracks 2, 19 and 20) Jeff Pescetto – backing vocals (track 17) Rami – backing vocals (track 9), engineering (tracks 4, 6, 8, 12 and 13), keyboards (tracks 4, 6 and 13), mixing (tracks 4, 6, 8, 9, 12, 13 and 18), production (tracks 4, 6, 8, 9, 12, 13 and 18), programming (tracks 4, 6 and 13), songwriting (tracks 4, 6, 12, 13 and 18) Edward Teddy Riley – songwriting (track 1) Emma Roads – backing vocals (track 1) Tim Roberts – engineering assistance (tracks 3, 5 and 7) Matthew Rolston – photography Larry Rudolph – management Reza Safina – engineering assistance (track 16) Daniel Savio – turntable (track 12) Jason Scheff – backing vocals (track 17) Keith Scott – songwriting (track 15) Guy Sigsworth – instrumentation (track 7), production (track 7) Ryan Smith – engineering assistance (track 3) Tom Soares – drum engineering (track 19) Jeanette Söderholm – backing vocals (track 9) Britney Spears – arrangement (track 5), songwriting (tracks 5, 7 and 19), vocals (all tracks) Annette Stamatelatos – songwriting (track 7) David Stamm – remix A&R direction Mark "Spike" Stent – mixing (track 5), vocal engineering (track 5) Christopher Stewart – arrangement (track 5), instrumentation (track 5), production (track 5), programming (track 5), songwriting (track 5), vocal arrangement (track 7), vocal production (track 7) Stockholm Session Strings – strings (tracks 2 and 19) Rich Tapper – engineering assistance (track 14) Brian "B-Luv" Thomas – digital editing (tracks 5 and 14), vocal engineering (track 14) Chris Thompson – backing vocals (track 17) David Treahearn – engineering assistance (track 5) Chris Trevett – vocal engineering (track 15) Michael "PGA Tour" Tucker – Pro Tools engineering (tracks 12 and 16), vocal engineering (track 18)