Some 257 songs have been performed at General Conference since 1996. For Mormons who wonder how often the same songs are in the conference lineup, here's a breakdown by the numbers.
257 songs performed since 1996:
184 hymns from the LDS Hymnal
21 songs from the Primary Children's Songbook
39 other spirituals not in the LDS Hymnal or Primary Children's Songbook
13 medleys
Ten most commonly sung hymns:
1. 'We Thank Thee, O God, for a Prophet' - 35 times
2. 'Redeemer of Israel' - 32 times
3. 'High on the Mountain Top' - 30 times
4. 'Guide Us, O Thou Great Jehovah' - 28 times
5. 'How Firm a Foundation' - 28 times
6. 'Now Let Us Rejoice' - 24 times
7. 'Come, Ye Children of the Lord' - 22 times
8. 'Rejoice, the Lord Is King' - 21 times
9. 'The Morning Breaks' - 20 times
10. 'I Know That My Redeemer Lives' - 17 times
Songs sung at the most conferences in a row:
1. 'We Thank Thee, O God, for a Prophet' - 24 consecutive conferences from April 1999 to October 2010
2. 'Redeemer of Israel' - 13 consecutive conferences from October 1996 to October 2002; followed by another 12 consecutive conferences from October 2003 to April 2009
3. 'High on the Mountain Top' - 11 consecutive conferences from October 2004 to October 2009
4. 'Now Let Us Rejoice' - 11 consecutive conferences from October 2002 to October 2007
5. 'Guide Us, O Thou Great Jehovah' - eight consecutive conferences from April 2001 to October 2004; followed by seven consecutive conferences from October 2007 to October 2010
6. 'How Firm a Foundation' - eight consecutive conferences from April 2005 to October 2008
7. 'Rejoice, the Lord Is King' - seven consecutive conferences from April 2011 the April 2014
8. 'Come, Ye Children of the Lord' - six consecutive conferences from October 2009 to April 2012; also five consecutive conferences from April 2005 to April 2007
9. 'I Know That My Redeemer Lives' - six consecutive conferences from October 1998 to April 2001
10. 'Praise to the Man' - five consecutive conferences from April 2003 to April 2005
11. 'The Lord is My Shepherd' - four consecutive conferences from October 1997 - April 1999
12. 'The Morning Breaks' - four consecutive conferences from April 1996 to October 1997
13. 'Come, O Thou King of Kings' - four consecutive conferences from April 2001 to October 2002
14. 'I Need Thee Every Hour' - three consecutive conference appearances in both October 1997 to October 1998 and October 2011 to October 2012
15. 'Come, Come, Ye Saints' - three consecutive conference appearances in both April 2000–April 2001 and April 2004–April 2005
Songs sung twice in a single conference:
'How Firm a Foundation' - April 2008, October 2009, April 2010, April 2011
'I Am a Child of God' - April 2002, April 2007, October 2014
'Now Let Us Rejoice' - October 1996, October 2008, October 2011
'Let Us All Press On' - October 2012, April 2014
'Lord, I Would Follow Thee' - October 2001, October 2008
'More Holiness Give Me' - April 2002, April 2013
'We Thank Thee, O God, for a Prophet' - April 1996
'Faith in Every Footstep' - April 1997
'Come, Come, Ye Saints' - April 1997
'Jesus, the Very Thought of Thee' - April 2000
'Oh, May My Soul Commune with Thee' - April 2001
'Press Forward, Saints' - October 2002
'He Sent His Son' - April 2003
'Come unto Him' - April 2003
'An Angel from on High' - April 2005
'Joseph Smith's First Prayer' - April 2005
'Redeemer of Israel' - October 2007
'High on the Mountain Top' - October 2007
'Guide Us, O Thou Great Jehovah' - April 2008
'Rejoice, the Lord Is King' - October 2008
'I Know That My Redeemer Lives' - April 2011
'The Morning Breaks' - October 2011
'Come, Ye Children of the Lord' - April 2012
'Let Zion in Her Beauty Rise' - April 2013