CJam - 90 ASCII / 55 Unicode

ASCII:

{{T):T}:F~", ":CFCF" o'clock":OCFO" rock,
"}Z*"We're gonna rock around the clock tonight."

Unicode:

"ƾ䗁楑恹繆䅶묣㪀◲挰뙡䭬圠ᐧ菒᫉Ծ밸⃭鸜㚪陞錮咥슝駐鉳㩛⚋翞⊠ꞷ摞贅ኴ얣⍾몮댑럚犻"FZ)#bBC*b:c~

Try them at http://cjam.aditsu.net/

CJam - 90 ASCII / 54 Unicode

ASCII:

{{T):T}:F~", ":CFCF" o'clock":OCFO" rock,
"}Z*"We're gonna rock around the clock tonight."

Unicode:

"ξ漰㠬༳ᆧᶃ㸩씪咦⏚騤䖫퍃᰽薂ᴤਥ궋씻㱗㽫Ƶꐥ勋䎔䃱魠ꝯ朐酠礢璿狮꓈执낦덋觫ᥛ琚"GZ)#bBC*b:c~

Try them at http://cjam.aditsu.net/

CJam - 90 ASCII

{{T):T}:F~", ":CFCF" o'clock":OCFO" rock,
"}Z*"We're gonna rock around the clock tonight."

Try it at http://cjam.aditsu.net/

The unicode version has other numbers, I'll need to redo it...

"盃식袡ᓲ思븞疍㼵柀ᤗ揬⯍・┙೙吨飛ꩉ垍匮瓧䏇䘿礲鐩葴ꍫ㕻穭縶〢腈勝㷧嬂顂諝∢빙灔"5e4b127b:c~

CJam - 90 ASCII / 55 Unicode

ASCII:

{{T):T}:F~", ":CFCF" o'clock":OCFO" rock,
"}Z*"We're gonna rock around the clock tonight."

Unicode:

"ƾ䗁楑恹繆䅶묣㪀◲挰뙡䭬圠ᐧ菒᫉Ծ밸⃭鸜㚪陞錮咥슝駐鉳㩛⚋翞⊠ꞷ摞贅ኴ얣⍾몮댑럚犻"FZ)#bBC*b:c~

Try them at http://cjam.aditsu.net/